Merge pull request #4656 from chennes/draftContextMenuFallback

[Draft] Enable Transform context menu item

src/Mod/Draft/draftviewproviders/view_base.py

@@ -383,13 +383,19 @@ class ViewProviderDraft(object):
 
         Returns
         -------
-        bool
+        bool or None
             It is `True` if `mode` is 0, and `Draft_Edit` ran successfully.
+            None if mode is not zero.
             It is `False` otherwise.
         """
         if mode == 0 and App.GuiUp: #remove guard after splitting every viewprovider
             Gui.runCommand("Draft_Edit")
             return True
+        elif mode != 0:
+            # Act like this function doesn't even exist, so the command falls back to Part (e.g. in the
+            # case of an unrecognized context menu action)
+            return None 
+
         return False
 
     def unsetEdit(self, vobj, mode=0):