FEM: do not use base vp for result mesh object, fixes some problems

src/Mod/Fem/femguiobjects/_ViewProviderFemMeshResult.py

@@ -29,12 +29,22 @@ __url__ = "http://www.freecadweb.org"
 #  \ingroup FEM
 #  \brief FreeCAD FEM _ViewProviderFemMeshResult
 
-from . import ViewProviderFemConstraint
+# from . import ViewProviderFemConstraint
 
 
-class _ViewProviderFemMeshResult(ViewProviderFemConstraint.ViewProxy):
+# class _ViewProviderFemMeshResult(ViewProviderFemConstraint.ViewProxy):
+class _ViewProviderFemMeshResult:
     """
     A View Provider for the FemMeshResult object
     """
+    def __init__(self, vobj):
+        vobj.Proxy = self
 
-    pass
+    def getIcon(self):
+        return ":/icons/FEM_MeshResult.svg"
+
+    def __getstate__(self):
+        return None
+
+    def __setstate__(self, state):
+        return None

src/Mod/Fem/femguiobjects/_ViewProviderFemResultMechanical.py

@@ -90,6 +90,8 @@ class _TaskPanel:
         # task panel should be started by use of setEdit of view provider
         # in view provider checks: Mesh, active analysis and
         # if Mesh and result are in active analysis
+        # activate the result mesh object
+        self.mesh_obj.ViewObject.show()
 
         ui_path = FreeCAD.getHomePath() + "Mod/Fem/Resources/ui/"
         self.result_widget = FreeCADGui.PySideUic.loadUi(ui_path + "ResultShow.ui")