Merge branch 'featureCoreProfile' into 'master'

Feature core profile

See merge request !3

SelectionBasePlugin.cc

@@ -221,6 +221,13 @@ void SelectionBasePlugin::initializePlugin() {
     pickModeToolBar_->addSeparator();
     pickModeToolBar_->addActions(selectionModesGroup_->actions());
 
+#if defined(ARCH_DARWIN)
+    // Workaround for QPainter using an unsupported rendering backend on core profiles
+    // See https://bugreports.qt.io/browse/QTBUG-32639
+    // setting opacity to a value smaller than 1 forces rasterizer engine
+    pickModeToolBar_->setWindowOpacity(0.99);
+#endif
+
     emit setPickModeToolbar(SELECTION_PICKING, pickModeToolBar_);
 }