diff --git a/src/kdefrontend/ui/datasources/importfilewidget.ui b/src/kdefrontend/ui/datasources/importfilewidget.ui
index ecf68bf06..5ce4d65bc 100644
--- a/src/kdefrontend/ui/datasources/importfilewidget.ui
+++ b/src/kdefrontend/ui/datasources/importfilewidget.ui
@@ -1,763 +1,763 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <ui version="4.0">
  <class>ImportFileWidget</class>
  <widget class="QWidget" name="ImportFileWidget">
   <property name="geometry">
    <rect>
     <x>0</x>
     <y>0</y>
     <width>679</width>
     <height>1045</height>
    </rect>
   </property>
   <property name="sizePolicy">
    <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
     <horstretch>0</horstretch>
     <verstretch>0</verstretch>
    </sizepolicy>
   </property>
   <layout class="QVBoxLayout" name="verticalLayout_2">
    <property name="leftMargin">
     <number>0</number>
    </property>
    <property name="topMargin">
     <number>0</number>
    </property>
    <property name="rightMargin">
     <number>0</number>
    </property>
    <property name="bottomMargin">
     <number>0</number>
    </property>
    <item>
     <widget class="QGroupBox" name="gbDataSource">
      <property name="sizePolicy">
       <sizepolicy hsizetype="Preferred" vsizetype="Minimum">
        <horstretch>0</horstretch>
        <verstretch>0</verstretch>
       </sizepolicy>
      </property>
      <property name="title">
       <string>Data source</string>
      </property>
      <layout class="QGridLayout" name="gridLayout">
       <item row="0" column="2">
        <widget class="QComboBox" name="cbSourceType">
         <item>
          <property name="text">
           <string>File or named pipe</string>
          </property>
         </item>
         <item>
          <property name="text">
           <string>Network TCP socket</string>
          </property>
         </item>
         <item>
          <property name="text">
           <string>Network UDP socket</string>
          </property>
         </item>
         <item>
          <property name="text">
           <string>Local socket</string>
          </property>
         </item>
         <item>
          <property name="text">
           <string>Serial port</string>
          </property>
         </item>
        </widget>
       </item>
       <item row="0" column="0" colspan="2">
        <widget class="QLabel" name="lSourceType">
         <property name="text">
          <string>Source</string>
         </property>
        </widget>
       </item>
       <item row="8" column="3">
        <widget class="QPushButton" name="bSaveFilter">
         <property name="enabled">
          <bool>false</bool>
         </property>
         <property name="toolTip">
          <string>Save the current filter settings</string>
         </property>
        </widget>
       </item>
       <item row="8" column="2">
        <widget class="KComboBox" name="cbFilter">
         <property name="enabled">
          <bool>false</bool>
         </property>
         <property name="sizePolicy">
          <sizepolicy hsizetype="MinimumExpanding" vsizetype="Fixed">
           <horstretch>0</horstretch>
           <verstretch>0</verstretch>
          </sizepolicy>
         </property>
        </widget>
       </item>
       <item row="8" column="4">
        <widget class="QPushButton" name="bManageFilters">
         <property name="enabled">
          <bool>false</bool>
         </property>
         <property name="sizePolicy">
          <sizepolicy hsizetype="Minimum" vsizetype="Minimum">
           <horstretch>0</horstretch>
           <verstretch>0</verstretch>
          </sizepolicy>
         </property>
         <property name="toolTip">
          <string>Manage filters</string>
         </property>
         <property name="text">
          <string/>
         </property>
        </widget>
       </item>
       <item row="2" column="0">
        <widget class="QLabel" name="lHost">
         <property name="text">
          <string>Host</string>
         </property>
        </widget>
       </item>
       <item row="7" column="2">
        <widget class="KComboBox" name="cbFileType">
         <property name="enabled">
          <bool>false</bool>
         </property>
        </widget>
       </item>
       <item row="3" column="2">
        <widget class="QLineEdit" name="lePort"/>
       </item>
       <item row="7" column="0">
        <widget class="QLabel" name="lFileType">
         <property name="text">
          <string>Type</string>
         </property>
        </widget>
       </item>
       <item row="1" column="3">
        <widget class="QPushButton" name="bOpen">
         <property name="sizePolicy">
          <sizepolicy hsizetype="Minimum" vsizetype="Minimum">
           <horstretch>0</horstretch>
           <verstretch>0</verstretch>
          </sizepolicy>
         </property>
         <property name="toolTip">
          <string> Select the file to import</string>
         </property>
         <property name="text">
          <string/>
         </property>
        </widget>
       </item>
       <item row="1" column="0" colspan="2">
        <widget class="QLabel" name="lFileName">
         <property name="text">
          <string>Name</string>
         </property>
        </widget>
       </item>
       <item row="3" column="0">
        <widget class="QLabel" name="lPort">
         <property name="text">
          <string>Port</string>
         </property>
        </widget>
       </item>
       <item row="1" column="2">
        <widget class="QLineEdit" name="leFileName">
         <property name="toolTip">
          <string>Specify the name of the file to import.</string>
         </property>
         <property name="clearButtonEnabled">
          <bool>true</bool>
         </property>
        </widget>
       </item>
       <item row="8" column="0">
        <widget class="QLabel" name="lFilter">
         <property name="text">
          <string>Filter</string>
         </property>
        </widget>
       </item>
       <item row="9" column="1">
        <spacer name="verticalSpacer_2">
         <property name="orientation">
          <enum>Qt::Vertical</enum>
         </property>
         <property name="sizeType">
          <enum>QSizePolicy::Fixed</enum>
         </property>
         <property name="sizeHint" stdset="0">
          <size>
           <width>20</width>
           <height>10</height>
          </size>
         </property>
        </spacer>
       </item>
       <item row="4" column="2">
        <widget class="QComboBox" name="cbSerialPort"/>
       </item>
       <item row="2" column="2">
        <widget class="QLineEdit" name="leHost"/>
       </item>
       <item row="1" column="4">
        <widget class="QPushButton" name="bFileInfo">
         <property name="enabled">
          <bool>false</bool>
         </property>
         <property name="sizePolicy">
          <sizepolicy hsizetype="Minimum" vsizetype="Minimum">
           <horstretch>0</horstretch>
           <verstretch>0</verstretch>
          </sizepolicy>
         </property>
         <property name="toolTip">
          <string>Show file info</string>
         </property>
         <property name="text">
          <string/>
         </property>
        </widget>
       </item>
       <item row="6" column="1">
        <spacer name="verticalSpacer_3">
         <property name="orientation">
          <enum>Qt::Vertical</enum>
         </property>
         <property name="sizeType">
          <enum>QSizePolicy::Fixed</enum>
         </property>
         <property name="sizeHint" stdset="0">
          <size>
           <width>20</width>
           <height>13</height>
          </size>
         </property>
        </spacer>
       </item>
       <item row="5" column="2">
        <widget class="QComboBox" name="cbBaudRate"/>
       </item>
       <item row="4" column="0">
        <widget class="QLabel" name="lSerialPort">
         <property name="text">
          <string>Port</string>
         </property>
        </widget>
       </item>
       <item row="5" column="0" colspan="2">
        <widget class="QLabel" name="lBaudRate">
         <property name="text">
          <string>Baud rate</string>
         </property>
        </widget>
       </item>
       <item row="10" column="2">
        <widget class="QTreeView" name="tvJson">
         <property name="editTriggers">
          <set>QAbstractItemView::NoEditTriggers</set>
         </property>
         <property name="showDropIndicator" stdset="0">
          <bool>false</bool>
         </property>
         <property name="iconSize">
          <size>
-          <width>32</width>
-          <height>0</height>
+          <width>16</width>
+          <height>16</height>
          </size>
         </property>
        </widget>
       </item>
       <item row="10" column="0">
        <widget class="QLabel" name="lField">
         <property name="text">
          <string>Field</string>
         </property>
        </widget>
       </item>
      </layout>
     </widget>
    </item>
    <item>
     <widget class="QGroupBox" name="gbOptions">
      <property name="enabled">
       <bool>false</bool>
      </property>
      <property name="sizePolicy">
       <sizepolicy hsizetype="Preferred" vsizetype="Expanding">
        <horstretch>0</horstretch>
        <verstretch>0</verstretch>
       </sizepolicy>
      </property>
      <property name="title">
       <string>Format Options</string>
      </property>
      <layout class="QVBoxLayout" name="verticalLayout_3">
       <property name="leftMargin">
        <number>0</number>
       </property>
       <property name="topMargin">
        <number>0</number>
       </property>
       <property name="rightMargin">
        <number>0</number>
       </property>
       <property name="bottomMargin">
        <number>0</number>
       </property>
       <item>
        <widget class="QTabWidget" name="tabWidget">
         <property name="currentIndex">
          <number>0</number>
         </property>
         <widget class="QWidget" name="tabDataFormat">
          <property name="sizePolicy">
           <sizepolicy hsizetype="Preferred" vsizetype="Expanding">
            <horstretch>0</horstretch>
            <verstretch>0</verstretch>
           </sizepolicy>
          </property>
          <attribute name="title">
           <string>Data format</string>
          </attribute>
          <layout class="QVBoxLayout" name="verticalLayout">
           <item>
            <widget class="QStackedWidget" name="swOptions">
             <property name="sizePolicy">
              <sizepolicy hsizetype="Preferred" vsizetype="Expanding">
               <horstretch>0</horstretch>
               <verstretch>0</verstretch>
              </sizepolicy>
             </property>
             <widget class="QWidget" name="page">
              <property name="sizePolicy">
               <sizepolicy hsizetype="Preferred" vsizetype="Expanding">
                <horstretch>0</horstretch>
                <verstretch>0</verstretch>
               </sizepolicy>
              </property>
             </widget>
             <widget class="QWidget" name="page_2">
              <property name="sizePolicy">
               <sizepolicy hsizetype="Preferred" vsizetype="Expanding">
                <horstretch>0</horstretch>
                <verstretch>0</verstretch>
               </sizepolicy>
              </property>
             </widget>
            </widget>
           </item>
          </layout>
         </widget>
         <widget class="QWidget" name="tabDataPreview">
          <property name="sizePolicy">
           <sizepolicy hsizetype="Preferred" vsizetype="Expanding">
            <horstretch>0</horstretch>
            <verstretch>0</verstretch>
           </sizepolicy>
          </property>
          <attribute name="title">
           <string>Preview</string>
          </attribute>
          <layout class="QGridLayout" name="gridLayout_3">
           <item row="0" column="0">
            <widget class="QLabel" name="lPreviewLines">
             <property name="sizePolicy">
              <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
               <horstretch>0</horstretch>
               <verstretch>0</verstretch>
              </sizepolicy>
             </property>
             <property name="text">
              <string>Number of rows to preview:</string>
             </property>
            </widget>
           </item>
           <item row="0" column="1">
            <widget class="QSpinBox" name="sbPreviewLines">
             <property name="minimum">
              <number>1</number>
             </property>
             <property name="maximum">
              <number>10000</number>
             </property>
             <property name="value">
              <number>100</number>
             </property>
            </widget>
           </item>
           <item row="0" column="2">
            <spacer name="horizontalSpacer">
             <property name="orientation">
              <enum>Qt::Horizontal</enum>
             </property>
             <property name="sizeHint" stdset="0">
              <size>
               <width>23</width>
               <height>20</height>
              </size>
             </property>
            </spacer>
           </item>
           <item row="0" column="3">
            <widget class="QPushButton" name="bRefreshPreview">
             <property name="text">
              <string>Refresh</string>
             </property>
            </widget>
           </item>
           <item row="1" column="0" colspan="4">
            <widget class="QTextEdit" name="tePreview">
             <property name="undoRedoEnabled">
              <bool>true</bool>
             </property>
             <property name="lineWrapMode">
              <enum>QTextEdit::NoWrap</enum>
             </property>
             <property name="readOnly">
              <bool>true</bool>
             </property>
            </widget>
           </item>
          </layout>
         </widget>
         <widget class="QWidget" name="tabDataPortion">
          <property name="sizePolicy">
           <sizepolicy hsizetype="Preferred" vsizetype="Minimum">
            <horstretch>0</horstretch>
            <verstretch>0</verstretch>
           </sizepolicy>
          </property>
          <attribute name="title">
           <string>Data portion to read</string>
          </attribute>
          <layout class="QGridLayout" name="gridLayout_2">
           <item row="0" column="0">
            <widget class="QLabel" name="lStartRow">
             <property name="text">
              <string>Start row:</string>
             </property>
            </widget>
           </item>
           <item row="0" column="4">
            <widget class="QSpinBox" name="sbEndRow">
             <property name="toolTip">
              <string>Specify the end row to import; -1 stands for the last row</string>
             </property>
             <property name="minimum">
              <number>-1</number>
             </property>
             <property name="maximum">
              <number>2147483647</number>
             </property>
             <property name="value">
              <number>-1</number>
             </property>
            </widget>
           </item>
           <item row="1" column="0">
            <widget class="QLabel" name="lStartColumn">
             <property name="text">
              <string>Start column:</string>
             </property>
            </widget>
           </item>
           <item row="1" column="1">
            <widget class="QSpinBox" name="sbStartColumn">
             <property name="toolTip">
              <string>Specify the start column for import</string>
             </property>
             <property name="minimum">
              <number>1</number>
             </property>
             <property name="maximum">
              <number>2147483647</number>
             </property>
            </widget>
           </item>
           <item row="1" column="2">
            <spacer name="horizontalSpacer_5">
             <property name="orientation">
              <enum>Qt::Horizontal</enum>
             </property>
             <property name="sizeType">
              <enum>QSizePolicy::Fixed</enum>
             </property>
             <property name="sizeHint" stdset="0">
              <size>
               <width>40</width>
               <height>20</height>
              </size>
             </property>
            </spacer>
           </item>
           <item row="0" column="1">
            <widget class="QSpinBox" name="sbStartRow">
             <property name="toolTip">
              <string>Specify the start row for import</string>
             </property>
             <property name="minimum">
              <number>1</number>
             </property>
             <property name="maximum">
              <number>2147483647</number>
             </property>
             <property name="value">
              <number>1</number>
             </property>
            </widget>
           </item>
           <item row="0" column="5">
            <spacer name="horizontalSpacer_4">
             <property name="orientation">
              <enum>Qt::Horizontal</enum>
             </property>
             <property name="sizeHint" stdset="0">
              <size>
               <width>108</width>
               <height>20</height>
              </size>
             </property>
            </spacer>
           </item>
           <item row="0" column="2">
            <spacer name="horizontalSpacer_3">
             <property name="orientation">
              <enum>Qt::Horizontal</enum>
             </property>
             <property name="sizeType">
              <enum>QSizePolicy::Fixed</enum>
             </property>
             <property name="sizeHint" stdset="0">
              <size>
               <width>40</width>
               <height>20</height>
              </size>
             </property>
            </spacer>
           </item>
           <item row="1" column="3">
            <widget class="QLabel" name="lEndColumn">
             <property name="text">
              <string>End column:</string>
             </property>
            </widget>
           </item>
           <item row="1" column="4">
            <widget class="QSpinBox" name="sbEndColumn">
             <property name="toolTip">
              <string>Specify the end column to import; -1 stands for the last column</string>
             </property>
             <property name="minimum">
              <number>-1</number>
             </property>
             <property name="maximum">
              <number>2147483647</number>
             </property>
             <property name="value">
              <number>-1</number>
             </property>
            </widget>
           </item>
           <item row="1" column="5">
            <spacer name="horizontalSpacer_6">
             <property name="orientation">
              <enum>Qt::Horizontal</enum>
             </property>
             <property name="sizeHint" stdset="0">
              <size>
               <width>108</width>
               <height>20</height>
              </size>
             </property>
            </spacer>
           </item>
           <item row="0" column="3">
            <widget class="QLabel" name="lEndRow">
             <property name="text">
              <string>End row:</string>
             </property>
            </widget>
           </item>
           <item row="3" column="0">
            <spacer name="verticalSpacer">
             <property name="orientation">
              <enum>Qt::Vertical</enum>
             </property>
             <property name="sizeHint" stdset="0">
              <size>
               <width>20</width>
               <height>10</height>
              </size>
             </property>
            </spacer>
           </item>
          </layout>
         </widget>
        </widget>
       </item>
      </layout>
     </widget>
    </item>
    <item>
     <widget class="QGroupBox" name="gbUpdateOptions">
      <property name="title">
       <string>Update Options</string>
      </property>
      <layout class="QGridLayout" name="gridLayout_4">
       <item row="0" column="1">
        <widget class="QComboBox" name="cbUpdateType">
         <property name="sizePolicy">
          <sizepolicy hsizetype="Expanding" vsizetype="Fixed">
           <horstretch>0</horstretch>
           <verstretch>0</verstretch>
          </sizepolicy>
         </property>
         <item>
          <property name="text">
           <string>Periodically</string>
          </property>
         </item>
         <item>
          <property name="text">
           <string>On new data</string>
          </property>
         </item>
        </widget>
       </item>
       <item row="8" column="0" colspan="2">
        <widget class="QCheckBox" name="chbLinkFile">
         <property name="toolTip">
          <string>If this option is checked, only the link to the file is stored in the project file but not it's content.</string>
         </property>
         <property name="text">
          <string>Link the file</string>
         </property>
         <property name="checked">
          <bool>true</bool>
         </property>
        </widget>
       </item>
       <item row="2" column="0">
        <widget class="QLabel" name="lReadType">
         <property name="text">
          <string>Read</string>
         </property>
        </widget>
       </item>
       <item row="6" column="0">
        <widget class="QLabel" name="lKeepLastValues">
         <property name="text">
          <string>Keep last N values</string>
         </property>
        </widget>
       </item>
       <item row="0" column="0">
        <widget class="QLabel" name="lUpdateType">
         <property name="text">
          <string>Update</string>
         </property>
        </widget>
       </item>
       <item row="4" column="0">
        <widget class="QLabel" name="lSampleRate">
         <property name="text">
          <string>Sample rate</string>
         </property>
        </widget>
       </item>
       <item row="4" column="1">
        <widget class="QSpinBox" name="sbSampleRate">
         <property name="minimum">
          <number>1</number>
         </property>
         <property name="maximum">
          <number>10000</number>
         </property>
         <property name="value">
          <number>5</number>
         </property>
        </widget>
       </item>
       <item row="2" column="1">
        <widget class="QComboBox" name="cbReadType">
         <item>
          <property name="text">
           <string>Continuously fixed</string>
          </property>
         </item>
         <item>
          <property name="text">
           <string>From end</string>
          </property>
         </item>
         <item>
          <property name="text">
           <string>Till the end</string>
          </property>
         </item>
        </widget>
       </item>
       <item row="1" column="0">
        <widget class="QLabel" name="lUpdateInterval">
         <property name="text">
          <string>Update interval</string>
         </property>
        </widget>
       </item>
       <item row="6" column="1">
        <widget class="QLineEdit" name="leKeepLastValues"/>
       </item>
       <item row="1" column="1">
        <widget class="QSpinBox" name="sbUpdateInterval">
         <property name="sizePolicy">
          <sizepolicy hsizetype="Preferred" vsizetype="Fixed">
           <horstretch>0</horstretch>
           <verstretch>0</verstretch>
          </sizepolicy>
         </property>
         <property name="minimum">
          <number>5</number>
         </property>
         <property name="maximum">
          <number>60000</number>
         </property>
         <property name="value">
          <number>1000</number>
         </property>
        </widget>
       </item>
       <item row="1" column="2">
        <widget class="QLabel" name="lUpdateIntervalUnit">
         <property name="text">
          <string>ms</string>
         </property>
        </widget>
       </item>
      </layout>
     </widget>
    </item>
   </layout>
  </widget>
  <customwidgets>
   <customwidget>
    <class>KComboBox</class>
    <extends>QComboBox</extends>
    <header>kcombobox.h</header>
   </customwidget>
  </customwidgets>
  <resources/>
  <connections/>
 </ui>