fix numpad + and - keys. Only numbers

template/qtgui/menu.py

@@ -375,7 +375,9 @@ class HoverActionDictionary(dict):
 
     def __setitem__(self, key, menuAction):
         """key is a string of a single number 0-9"""
-        assert key in "0 1 2 3 4 5 6 7 8 9".split()
+        if not key in "0 1 2 3 4 5 6 7 8 9".split():
+            #No Numpad + and -
+            return
 
         try:
             self[key].setShortcut(QtGui.QKeySequence()) #reset the action that previously had that shortcut