write custom action class to notify shape node about vbo changes

src/Mod/Part/Gui/ViewProviderExt.cpp

@@ -106,6 +106,7 @@
 #include <App/Document.h>
 
 #include <Gui/SoFCUnifiedSelection.h>
+#include <Gui/SoFCSelectionAction.h>
 #include <Gui/Selection.h>
 #include <Gui/View3DInventorViewer.h>
 #include <Gui/Utilities.h>
@@ -800,8 +801,8 @@ void ViewProviderPartExt::reload()
 void ViewProviderPartExt::updateData(const App::Property* prop)
 {
     if (prop->getTypeId() == Part::PropertyPartShape::getClassTypeId()) {
-        // vejmarie: Force VBO update of the part
-        this->faceset->updateVbo = true;
+        Gui::SoUpdateVBOAction action;
+        action.apply(this->faceset);
 
         // get the shape to show
         const TopoDS_Shape &cShape = static_cast<const Part::PropertyPartShape*>(prop)->getValue();