Fixing menu location, now works also in lexonomy

src/message/show_messages.py

@@ -16,7 +16,7 @@ class GenericShowModal(ClickMessage):
 class ShowMenu(ClickMessage):
     def __init__(self, event, translation):
         super().__init__(event)
-        self.menu_location = (event.pageX, event.pageY)
+        self.menu_location = (event.layerX, event.layerY)
         self.translation = translation
     
     def update_model(self, model):