FEM: Handle python vtk user installs that conflict with FreeCAD VTK

src/Mod/Fem/InitGui.py

@@ -80,6 +80,10 @@ class FemWorkbench(Workbench):
         False if FemGui.__name__ else True
         False if femcommands.commands.__name__ else True
 
+        # check vtk version to potentially find missmatchs
+        from femguiutils.vtk_module_handling import vtk_module_handling
+        vtk_module_handling()
+
     def GetClassName(self):
         # see https://forum.freecad.org/viewtopic.php?f=10&t=43300
         return "FemGui::Workbench"