FEM: use python base constraint class, mesh result mesh

src/Mod/Fem/femguiobjects/_ViewProviderFemMeshResult.py

@@ -28,27 +28,11 @@ __url__ = "http://www.freecadweb.org"
 #  \ingroup FEM
 #  \brief FreeCAD FEM _ViewProviderFemMeshResult
 
+from . import ViewProviderFemConstraint
 
-class _ViewProviderFemMeshResult:
+
+class _ViewProviderFemMeshResult(ViewProviderFemConstraint.ViewProxy):
     "A View Provider for the FemMeshResult object"
-    def __init__(self, vobj):
-        vobj.Proxy = self
 
     def getIcon(self):
         return ":/icons/fem-femmesh-result.svg"
-
-    def attach(self, vobj):
-        self.ViewObject = vobj
-        self.Object = vobj.Object
-
-    def updateData(self, obj, prop):
-        return
-
-    def onChanged(self, vobj, prop):
-        return
-
-    def __getstate__(self):
-        return None
-
-    def __setstate__(self, state):
-        return None