diff --git a/libs/ui/widgets/kis_layer_filter_widget.cpp b/libs/ui/widgets/kis_layer_filter_widget.cpp
index 88e5d6c9bc..c096a8ac70 100644
--- a/libs/ui/widgets/kis_layer_filter_widget.cpp
+++ b/libs/ui/widgets/kis_layer_filter_widget.cpp
@@ -1,289 +1,296 @@
 /*
  *  Copyright (c) 2020 Eoin O'Neill <eoinoneill1991@gmail.com>
  *  Copyright (c) 2020 Emmet O'Neill <emmetoneill.pdx@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_layer_filter_widget.h"
 
 #include <QApplication>
 #include <QVBoxLayout>
 #include <QLineEdit>
 #include <QCompleter>
 #include <QEvent>
 #include <QMouseEvent>
 #include <QButtonGroup>
 #include <QPushButton>
 #include <QMenu>
 #include <QScreen>
 
 #include "kis_debug.h"
 #include "kis_node.h"
 #include "kis_global.h"
 #include "kis_color_label_button.h"
 #include "kis_color_label_selector_widget.h"
 #include "kis_node_view_color_scheme.h"
 
 KisLayerFilterWidget::KisLayerFilterWidget(QWidget *parent) : QWidget(parent)
 {
     QVBoxLayout *layout = new QVBoxLayout(this);
     setLayout(layout);
     setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
 
     textFilter = new QLineEdit(this);
     textFilter->setPlaceholderText(i18n("Filter by name..."));
     textFilter->setMinimumWidth(192);
     textFilter->setMinimumHeight(32);
     textFilter->setClearButtonEnabled(true);
 
     connect(textFilter, SIGNAL(textChanged(QString)), this, SIGNAL(filteringOptionsChanged()));
 
     KisNodeViewColorScheme colorScheme;
 
     QWidget* buttonContainer = new QWidget(this);
     buttonContainer->setToolTip(i18n("Filter by color label..."));
     buttonEventFilter = new EventFilter(buttonContainer);
     {
         QHBoxLayout *subLayout = new QHBoxLayout(buttonContainer);
         buttonContainer->setLayout(subLayout);
         subLayout->setContentsMargins(0,0,0,0);
         subLayout->setAlignment(Qt::AlignLeft);
         buttonGroup = new KisColorLabelFilterGroup(buttonContainer);
         buttonGroup->setExclusive(false);
         QVector<QColor> colors = colorScheme.allColorLabels();
 
         for (int id = 0; id < colors.count(); id++) {
             KisColorLabelButton* btn = new KisColorLabelButton(colors[id], 32, buttonContainer);
             buttonGroup->addButton(btn, id);
             btn->installEventFilter(buttonEventFilter);
             subLayout->addWidget(btn);
         }
 
         connect(buttonGroup, SIGNAL(buttonToggled(int,bool)), this, SIGNAL(filteringOptionsChanged()));
     }
 
     resetButton = new QPushButton(i18n("Reset Filters"), this);
     resetButton->setMinimumHeight(32);
     connect(resetButton, &QPushButton::clicked, [this](){
        this->reset();
     });
 
 
     layout->addWidget(textFilter);
     layout->addWidget(buttonContainer);
     layout->addWidget(resetButton);
 }
 
 void KisLayerFilterWidget::scanUsedColorLabels(KisNodeSP node, QSet<int> &colorLabels)
 {
     if (node->parent()) {
         colorLabels.insert(node->colorLabelIndex());
     }
 
     KisNodeSP child = node->firstChild();
     while(child) {
         scanUsedColorLabels(child, colorLabels);
         child = child->nextSibling();
     }
 }
 
 void KisLayerFilterWidget::updateColorLabels(KisNodeSP root)
 {
     QSet<int> colorLabels;
 
     scanUsedColorLabels(root, colorLabels);
     buttonGroup->setViableLabels(colorLabels);
 }
 
 bool KisLayerFilterWidget::isCurrentlyFiltering() const
 {
     const bool isFilteringText = !textFilter->text().isEmpty();
     const bool isFilteringColors = buttonGroup->getActiveLabels().count() > 0;
 
     return isFilteringText || isFilteringColors;
 }
 
 QSet<int> KisLayerFilterWidget::getActiveColors() const
 {
     QSet<int> activeColors = buttonGroup->getActiveLabels();
 
     return activeColors;
 }
 
 QString KisLayerFilterWidget::getTextFilter() const
 {
     return textFilter->text();
 }
 
 int KisLayerFilterWidget::getDesiredMinimumWidth() const {
     return qMax(textFilter->minimumWidth(), buttonGroup->countViableButtons() * 32);
 }
 
 int KisLayerFilterWidget::getDesiredMinimumHeight() const {
     QList<QAbstractButton*> viableButtons = buttonGroup->viableButtons();
     if (viableButtons.count() > 1) {
         return viableButtons[0]->sizeHint().height() + textFilter->minimumHeight() + resetButton->minimumHeight();
     } else {
         return textFilter->minimumHeight() + resetButton->minimumHeight();
     }
 }
 
 void KisLayerFilterWidget::reset()
 {
     textFilter->clear();
     buttonGroup->reset();
     filteringOptionsChanged();
 }
 
 QSize KisLayerFilterWidget::sizeHint() const
 {
     return QSize(getDesiredMinimumWidth(), getDesiredMinimumHeight());
 }
 
 void KisLayerFilterWidget::showEvent(QShowEvent *show)
 {
     QMenu *parentMenu = dynamic_cast<QMenu*>(parentWidget());
-    QScreen *screen = QGuiApplication::screenAt(parentMenu->mapToGlobal(parentMenu->pos()));
-    if (parentMenu && screen) {
+
+    if (parentMenu) {
         const int widthBefore = parentMenu->width();
         const int rightEdgeThreshold = 5;
-        const bool onRightEdge = (parentMenu->pos().x() + parentMenu->width() + rightEdgeThreshold) > screen->geometry().width();
+
+        //Fake resize event needs to be made to register change in widget menu size.
+        //Not doing this will cause QMenu to not resize properly!
+        resize(sizeHint());
         adjustSize();
-        QResizeEvent event = QResizeEvent(size(), parentMenu->size());
+        QResizeEvent event = QResizeEvent(sizeHint(), parentMenu->size());
 
-        parentMenu->resize(size());
+        parentMenu->resize(sizeHint());
         parentMenu->adjustSize();
         qApp->sendEvent(parentMenu, &event);
 
+        QScreen *screen = QGuiApplication::screenAt(parentMenu->mapToGlobal(parentMenu->pos()));
+        QRect screenGeometry = screen ? screen->geometry() : parentMenu->parentWidget()->window()->geometry();
+
+        const bool onRightEdge = (parentMenu->pos().x() + widthBefore + rightEdgeThreshold) >  screenGeometry.width();
         const int widthAfter = parentMenu->width();
 
         if (onRightEdge) {
             if (widthAfter > widthBefore) {
-                const QRect newGeo = kisEnsureInRect( parentMenu->geometry(), screen->geometry() );
+                const QRect newGeo = kisEnsureInRect( parentMenu->geometry(), screenGeometry );
                 const int xShift = newGeo.x() - parentMenu->pos().x();
                 parentMenu->move(parentMenu->pos().x() + xShift, parentMenu->pos().y() + 0);
             } else {
                 const int xShift = widthBefore - widthAfter;
                 parentMenu->move(parentMenu->pos().x() + xShift, parentMenu->pos().y() + 0);
             }
         }
     }
     QWidget::showEvent(show);
 }
 
 KisLayerFilterWidget::EventFilter::EventFilter(QWidget *buttonContainer, QObject* parent) : QObject(parent)
 {
     m_buttonContainer = buttonContainer;
     lastKnownMousePosition = QPoint(0,0);
     currentState = Idle;
 }
 
 bool KisLayerFilterWidget::EventFilter::eventFilter(QObject *obj, QEvent *event)
 {
     if (event->type() == QEvent::MouseButtonPress) {
         QMouseEvent* mouseEvent = static_cast<QMouseEvent*>(event);
 
         currentState = WaitingForDragLeave;
         lastKnownMousePosition = mouseEvent->globalPos();
 
         return true;
 
     } else if (event->type() == QEvent::MouseButtonRelease) {
         QMouseEvent* mouseEvent = static_cast<QMouseEvent*>(event);
         QAbstractButton* startingButton = static_cast<QAbstractButton*>(obj);
 
         //If we never left, toggle the original button.
         if( currentState == WaitingForDragLeave ) {
             if ( startingButton->group() && (mouseEvent->modifiers() & Qt::SHIFT)) {
                 KisColorLabelFilterGroup* const group = static_cast<KisColorLabelFilterGroup*>(startingButton->group());
                 const QList<QAbstractButton*> viableCheckedButtons = group->checkedViableButtons();
 
                 const int buttonsEnabled = viableCheckedButtons.count();
                 const bool shouldChangeIsolation = (buttonsEnabled == 1) && (viableCheckedButtons.first() == startingButton);
                 const bool shouldIsolate = (buttonsEnabled != 1) || !shouldChangeIsolation;
 
                 Q_FOREACH(QAbstractButton* otherBtn, group->viableButtons()) {
                     if (otherBtn == startingButton){
                         startingButton->setChecked(true);
                     } else {
                         otherBtn->setChecked(!shouldIsolate);
                     }
                 }
 
             } else {
                 startingButton->click();
             }
         }
 
         currentState = Idle;
         lastKnownMousePosition = mouseEvent->globalPos();
 
         return true;
 
     } else if (event->type() == QEvent::MouseMove) {
 
         if (currentState == WaitingForDragLeave) {
             QMouseEvent* mouseEvent = static_cast<QMouseEvent*>(event);
             QWidget* firstClicked = static_cast<QWidget*>(obj);
             const QPointF localPosition = mouseEvent->localPos();
 
             if (!firstClicked->rect().contains(localPosition.x(), localPosition.y())) {
                 QAbstractButton* btn = static_cast<QAbstractButton*>(obj);
                 btn->click();
 
                 checkSlideOverNeighborButtons(mouseEvent, btn);
 
                 currentState = WaitingForDragEnter;
             }
 
             lastKnownMousePosition = mouseEvent->globalPos();
 
             return true;
 
         } else if (currentState == WaitingForDragEnter) {
             QMouseEvent* mouseEvent = static_cast<QMouseEvent*>(event);
             QAbstractButton* startingButton = static_cast<QAbstractButton*>(obj);
             const QPoint currentPosition = mouseEvent->globalPos();
 
             checkSlideOverNeighborButtons(mouseEvent, startingButton);
 
             lastKnownMousePosition = currentPosition;
 
             return true;
         }
 
     }
 
     return false;
 }
 
 void KisLayerFilterWidget::EventFilter::checkSlideOverNeighborButtons(QMouseEvent* mouseEvent, QAbstractButton* startingButton)
 {
     const QPoint currentPosition = mouseEvent->globalPos();
 
     if (startingButton->group()) {
         QList<QAbstractButton*> allButtons = startingButton->group()->buttons();
 
         Q_FOREACH(QAbstractButton* button, allButtons) {
             const QRect bounds = QRect(button->mapToGlobal(QPoint(0,0)), button->size());
             const QPoint upperLeft = QPoint(qMin(lastKnownMousePosition.x(), currentPosition.x()), qMin(lastKnownMousePosition.y(), currentPosition.y()));
             const QPoint lowerRight = QPoint(qMax(lastKnownMousePosition.x(), currentPosition.x()), qMax(lastKnownMousePosition.y(), currentPosition.y()));
             const QRect mouseMovement = QRect(upperLeft, lowerRight);
             if( bounds.intersects(mouseMovement) && !bounds.contains(lastKnownMousePosition)) {
                 button->click();
             }
         }
     }
 }