diff --git a/src/ui/themeconfig.ui b/src/ui/themeconfig.ui
--- a/src/ui/themeconfig.ui
+++ b/src/ui/themeconfig.ui
@@ -6,8 +6,8 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>620</width>
-    <height>555</height>
+    <width>950</width>
+    <height>686</height>
    </rect>
   </property>
   <layout class="QVBoxLayout" name="verticalLayout">
@@ -49,14 +49,26 @@
      </item>
      <item>
       <widget class="QGroupBox" name="customizeBox">
+       <property name="sizePolicy">
+        <sizepolicy hsizetype="Fixed" vsizetype="Preferred">
+         <horstretch>0</horstretch>
+         <verstretch>0</verstretch>
+        </sizepolicy>
+       </property>
+       <property name="minimumSize">
+        <size>
+         <width>450</width>
+         <height>0</height>
+        </size>
+       </property>
        <property name="title">
-        <string>Customize theme</string>
+        <string notr="true"/>
        </property>
        <layout class="QVBoxLayout" name="verticalLayout_2">
         <item>
          <widget class="QQuickWidget" name="quickWidget">
           <property name="sizePolicy">
-           <sizepolicy hsizetype="Minimum" vsizetype="Minimum">
+           <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
             <horstretch>0</horstretch>
             <verstretch>0</verstretch>
            </sizepolicy>
@@ -74,7 +86,16 @@
         </item>
         <item>
          <layout class="QGridLayout" name="gridLayout">
-          <item row="0" column="1">
+          <property name="leftMargin">
+           <number>6</number>
+          </property>
+          <property name="topMargin">
+           <number>6</number>
+          </property>
+          <property name="bottomMargin">
+           <number>6</number>
+          </property>
+          <item row="1" column="0">
            <widget class="SelectImageButton" name="selectBackgroundButton">
             <property name="text">
              <string>...</string>
@@ -87,10 +108,26 @@
              <string>Background:</string>
             </property>
             <property name="alignment">
-             <set>Qt::AlignLeading|Qt::AlignLeft|Qt::AlignVCenter</set>
+             <set>Qt::AlignLeading|Qt::AlignLeft|Qt::AlignTop</set>
+            </property>
+            <property name="margin">
+             <number>0</number>
             </property>
            </widget>
           </item>
+          <item row="0" column="1">
+           <spacer name="horizontalSpacer_2">
+            <property name="orientation">
+             <enum>Qt::Horizontal</enum>
+            </property>
+            <property name="sizeHint" stdset="0">
+             <size>
+              <width>40</width>
+              <height>20</height>
+             </size>
+            </property>
+           </spacer>
+          </item>
          </layout>
         </item>
         <item>
@@ -120,8 +157,7 @@
        </property>
        <property name="icon">
         <iconset theme="delete">
-         <normaloff/>
-        </iconset>
+         <normaloff>.</normaloff>.</iconset>
        </property>
       </widget>
      </item>
@@ -145,8 +181,7 @@
        </property>
        <property name="icon">
         <iconset theme="document-import">
-         <normaloff/>
-        </iconset>
+         <normaloff>.</normaloff>.</iconset>
        </property>
       </widget>
      </item>
@@ -157,25 +192,25 @@
        </property>
        <property name="icon">
         <iconset theme="get-hot-new-stuff">
-         <normaloff/>
-        </iconset>
+         <normaloff>.</normaloff>.</iconset>
        </property>
       </widget>
      </item>
     </layout>
    </item>
   </layout>
  </widget>
  <customwidgets>
+  <customwidget>
+   <class>QQuickWidget</class>
+   <extends>QWidget</extends>
+   <header location="global">QtQuickWidgets/QQuickWidget</header>
+  </customwidget>
   <customwidget>
    <class>KMessageWidget</class>
    <extends>QFrame</extends>
    <header>kmessagewidget.h</header>
-  </customwidget>
-  <customwidget>
-   <class>QQuickWidget</class>
-   <extends>QWidget</extends>
-   <header>QtQuickWidgets/QQuickWidget</header>
+   <container>1</container>
   </customwidget>
   <customwidget>
    <class>SelectImageButton</class>