diff --git a/libs/ui/widgets/kis_color_filter_combo.cpp b/libs/ui/widgets/kis_color_filter_combo.cpp
index bf89954f86..224054391f 100644
--- a/libs/ui/widgets/kis_color_filter_combo.cpp
+++ b/libs/ui/widgets/kis_color_filter_combo.cpp
@@ -1,348 +1,371 @@
 /*
  *  Copyright (c) 2015 Dmitry Kazakov <dimula73@gmail.com>
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
  *  This program is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License
  *  along with this program; if not, write to the Free Software
  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  */
 
 #include "kis_color_filter_combo.h"
 
 #include <klocalizedstring.h>
 #include <QStylePainter>
 #include <QtCore/qmath.h>
 #include <QApplication>
+#include <QProxyStyle>
 #include <QStyleOption>
 #include <QSortFilterProxyModel>
 #include <QStandardItemModel>
 #include <QListView>
 #include <QMouseEvent>
 
 
 
 
 #include "kis_node_view_color_scheme.h"
 #include "kis_debug.h"
 #include "kis_icon_utils.h"
 #include "krita_utils.h"
 #include "kis_node.h"
 
 enum AdditionalRoles {
     OriginalLabelIndex = Qt::UserRole + 1000
 };
 
 
 struct LabelFilteringModel : public QSortFilterProxyModel
 {
     LabelFilteringModel(QObject *parent) : QSortFilterProxyModel(parent) {}
 
     bool filterAcceptsRow(int source_row, const QModelIndex &source_parent) const override {
         const QModelIndex index = sourceModel()->index(source_row, 0, source_parent);
         const int labelIndex = index.data(OriginalLabelIndex).toInt();
 
 
         return labelIndex < 0 || m_acceptedLabels.contains(labelIndex);
     }
 
     void setAcceptedLabels(const QSet<int> &value) {
         m_acceptedLabels = value;
         invalidateFilter();
     }
 
 private:
     QSet<int> m_acceptedLabels;
 };
 
 
 class ComboEventFilter : public QObject
 {
 public:
     ComboEventFilter(KisColorFilterCombo *parent) : m_parent(parent), m_buttonPressed(false) {}
 
 protected:
     bool eventFilter(QObject *obj, QEvent *event) override {
         if (event->type() == QEvent::Leave) {
             m_buttonPressed = false;
 
         } else if (event->type() == QEvent::MouseButtonPress) {
             QMouseEvent *mevent = static_cast<QMouseEvent*>(event);
             m_buttonPressed = mevent->button() == Qt::LeftButton;
 
         } else if (event->type() == QEvent::MouseButtonRelease) {
             QMouseEvent *mevent = static_cast<QMouseEvent*>(event);
             QModelIndex index = m_parent->view()->indexAt(mevent->pos());
             if (!index.isValid()) return false;
 
             /**
              * We should eat the first event that arrives exactly when
              * the drop down appears on screen.
              */
             if (!m_buttonPressed) return true;
 
             const bool toUncheckedState = index.data(Qt::CheckStateRole) == Qt::Checked;
 
             if (toUncheckedState) {
                 m_parent->model()->setData(index, Qt::Unchecked, Qt::CheckStateRole);
             } else {
                 m_parent->model()->setData(index, Qt::Checked, Qt::CheckStateRole);
             }
 
             if (index.data(OriginalLabelIndex).toInt() == -1) {
                 for (int i = 0; i < m_parent->model()->rowCount(); i++) {
                     const QModelIndex &other = m_parent->model()->index(i, 0);
                     if (other.data(OriginalLabelIndex) != -1) {
                         m_parent->model()->setData(other, toUncheckedState ? Qt::Unchecked : Qt::Checked, Qt::CheckStateRole);
                     }
                 }
             } else {
                 bool prevChecked = false;
                 bool checkedVaries = false;
                 QModelIndex allLabelsIndex;
 
                 for (int i = 0; i < m_parent->model()->rowCount(); i++) {
                     const QModelIndex &other = m_parent->model()->index(i, 0);
                     if (other.data(OriginalLabelIndex) != -1) {
                         const bool currentChecked = other.data(Qt::CheckStateRole) == Qt::Checked;
 
                         if (i == 0) {
                             prevChecked = currentChecked;
                         } else {
                             if (prevChecked != currentChecked) {
                                 checkedVaries = true;
                                 break;
                             }
                         }
                     } else {
                         allLabelsIndex = other;
                     }
                 }
 
                 const bool allLabelsIndexShouldBeChecked =
                     prevChecked && !checkedVaries;
 
                 if (allLabelsIndexShouldBeChecked !=
                     (allLabelsIndex.data(Qt::CheckStateRole) == Qt::Checked)) {
 
                     m_parent->model()->setData(allLabelsIndex, allLabelsIndexShouldBeChecked ? Qt::Checked : Qt::Unchecked, Qt::CheckStateRole);
                 }
             }
 
             emit m_parent->selectedColorsChanged();
 
             m_buttonPressed = false;
             return true;
         }
 
         return QObject::eventFilter(obj, event);
     }
 
 private:
     KisColorFilterCombo *m_parent;
     bool m_buttonPressed;
 };
 
 class FullSizedListView : public QListView
 {
 public:
     QSize sizeHint() const override {
         return contentsSize();
     }
 };
 
+class PopupComboBoxStyle : public QProxyStyle
+{
+public:
+    PopupComboBoxStyle(QStyle *baseStyle = nullptr) : QProxyStyle(baseStyle) {}
+
+    int styleHint(QStyle::StyleHint hint, const QStyleOption *option, const QWidget *widget, QStyleHintReturn *returnData) const override
+    {
+        // This flag makes ComboBox popup float ontop of its parent ComboBox, like in Fusion style.
+        // Only when this hint is set will Qt respect combobox popup size hints, otherwise the popup
+        // can never exceed the width of its parent ComboBox, like in Breeze style.
+        if (hint == QStyle::SH_ComboBox_Popup) {
+            return true;
+        }
+
+        return QProxyStyle::styleHint(hint, option, widget, returnData);
+    }
+};
+
 struct KisColorFilterCombo::Private
 {
     LabelFilteringModel *filteringModel;
 };
 
 KisColorFilterCombo::KisColorFilterCombo(QWidget *parent)
     : QComboBox(parent),
       m_d(new Private)
 {
     QStandardItemModel *newModel = new QStandardItemModel(this);
     setModel(newModel);
 
+    PopupComboBoxStyle *proxyStyle = new PopupComboBoxStyle(style());
+    proxyStyle->setParent(this);
+    setStyle(proxyStyle);
+
     setView(new FullSizedListView);
     m_eventFilters.append(new ComboEventFilter(this));
     m_eventFilters.append(new ComboEventFilter(this));
 
     view()->installEventFilter(m_eventFilters[0]);
     view()->viewport()->installEventFilter(m_eventFilters[1]);
 
     KisNodeViewColorScheme scm;
 
     QStandardItem* item = new QStandardItem(i18nc("combo box: show all layers", "All"));
     item->setCheckable(true);
     item->setCheckState(Qt::Unchecked);
     item->setData(QColor(Qt::transparent), Qt::BackgroundColorRole);
     item->setData(int(-1), OriginalLabelIndex);
     item->setData(QSize(30, scm.rowHeight()), Qt::SizeHintRole);
     newModel->appendRow(item);
 
     int labelIndex = 0;
     foreach (const QColor &color, scm.allColorLabels()) {
         const QString title = color.alpha() > 0 ? "" : i18nc("combo box: select all layers without a label", "No Label");
 
         QStandardItem* item = new QStandardItem(title);
         item->setCheckable(true);
         item->setCheckState(Qt::Unchecked);
         item->setData(color, Qt::BackgroundColorRole);
         item->setData(labelIndex, OriginalLabelIndex);
         item->setData(QSize(30, scm.rowHeight()), Qt::SizeHintRole);
         newModel->appendRow(item);
 
         labelIndex++;
     }
 
     m_d->filteringModel = new LabelFilteringModel(this);
     QAbstractItemModel *originalModel = model();
     originalModel->setParent(m_d->filteringModel);
 
     m_d->filteringModel->setSourceModel(originalModel);
     setModel(m_d->filteringModel);
 }
 
 KisColorFilterCombo::~KisColorFilterCombo()
 {
     qDeleteAll(m_eventFilters);
 }
 
 void collectAvailableLabels(KisNodeSP root, QSet<int> *labels)
 {
     labels->insert(root->colorLabelIndex());
 
     KisNodeSP node = root->firstChild();
     while (node) {
         collectAvailableLabels(node, labels);
         node = node->nextSibling();
     }
 }
 
 void KisColorFilterCombo::updateAvailableLabels(KisNodeSP rootNode)
 {
     QSet<int> labels;
     collectAvailableLabels(rootNode, &labels);
 
     updateAvailableLabels(labels);
 }
 
 void KisColorFilterCombo::updateAvailableLabels(const QSet<int> &labels)
 {
     m_d->filteringModel->setAcceptedLabels(labels);
 }
 
 QList<int> KisColorFilterCombo::selectedColors() const
 {
     QList<int> colors;
     for (int i = 0; i < model()->rowCount(); i++) {
         const QModelIndex &other = model()->index(i, 0);
         const int label = other.data(OriginalLabelIndex).toInt();
 
         if (label != -1 &&
             other.data(Qt::CheckStateRole) == Qt::Checked) {
 
             colors << label;
         }
     }
     return colors;
 }
 
 void KisColorFilterCombo::paintEvent(QPaintEvent *event)
 {
     Q_UNUSED(event);
 
     QStylePainter painter(this);
     painter.setPen(palette().color(QPalette::Text));
 
     // draw the combobox frame, focusrect and selected etc.
     QStyleOptionComboBox opt;
     initStyleOption(&opt);
     painter.drawComplexControl(QStyle::CC_ComboBox, opt);
 
     {
         KisNodeViewColorScheme scm;
         const QRect editRect = style()->subControlRect(QStyle::CC_ComboBox, &opt, QStyle::SC_ComboBoxEditField, this);
         const int size = qMin(editRect.width(), editRect.height());
 
         const QList<int> selectedColors = this->selectedColors();
 
         if (selectedColors.size() == 0 || selectedColors.size() == model()->rowCount() - 1) {
             QIcon icon = KisIconUtils::loadIcon("view-filter");
             QPixmap pixmap = icon.pixmap(QSize(size, size), !isEnabled() ? QIcon::Disabled : QIcon::Normal);
             painter.drawPixmap(editRect.right() - size, editRect.top(), pixmap);
 
         } else if (selectedColors.size() == 1) {
             const int currentLabel = selectedColors.first();
             QColor currentColor = scm.colorLabel(currentLabel);
 
             if (currentColor.alpha() > 0) {
                 painter.fillRect(editRect, currentColor);
             } else if (currentLabel == 0) {
                 QPen oldPen = painter.pen();
 
                 const int border = 4;
                 QRect crossRect(0, 0, size - 2 * border, size - 2 * border);
                 crossRect.moveCenter(editRect.center());
 
                 QColor shade = opt.palette.dark().color();
                 painter.setPen(QPen(shade, 2));
                 painter.drawLine(crossRect.topLeft(), crossRect.bottomRight());
                 painter.drawLine(crossRect.bottomLeft(), crossRect.topRight());
             }
         } else {
             const int border = 0;
             QRect pieRect(0, 0, size - 2 * border, size - 2 * border);
             pieRect.moveCenter(editRect.center());
 
             const int numColors = selectedColors.size();
             const int step = 16 * 360 / numColors;
 
             int currentAngle = 0;
 
             //painter.save(); // optimize out!
             painter.setRenderHint(QPainter::Antialiasing);
 
             for (int i = 0; i < numColors; i++) {
                 QColor color = scm.colorLabel(selectedColors[i]);
                 QBrush brush = color.alpha() > 0 ? QBrush(color) : QBrush(Qt::black, Qt::Dense4Pattern);
                 painter.setPen(color);
                 painter.setBrush(brush);
 
                 painter.drawPie(pieRect, currentAngle, step);
                 currentAngle += step;
             }
             //painter.restore(); // optimize out!
         }
     }
 
     // draw the icon and text
     //painter.drawControl(QStyle::CE_ComboBoxLabel, opt);
 }
 
 QSize KisColorFilterCombo::minimumSizeHint() const
 {
     return sizeHint();
 }
 
 QSize KisColorFilterCombo::sizeHint() const
 {
     QStyleOptionComboBox opt;
     initStyleOption(&opt);
 
     const QStyleOption *baseOption = qstyleoption_cast<const QStyleOption *>(&opt);
     const int arrowSize = style()->pixelMetric(QStyle::PM_ScrollBarExtent, baseOption, this);
 
     const QSize originalHint = QComboBox::sizeHint();
     QSize sh(3 * arrowSize, originalHint.height());
 
     return sh;
 }