replace "extended" by "keymask" for finer grained checks

server/menuitem.h

@@ -312,7 +312,7 @@ void menuitem_update_screen(MenuItem *item, Screen *s);
 /** Does something with the given input.
  * key is only used if token is MENUTOKEN_OTHER.
  */
-MenuResult menuitem_process_input(MenuItem *item, MenuToken token, const char *key, bool extended);
+MenuResult menuitem_process_input(MenuItem *item, MenuToken token, const char *key, unsigned int keymask);
 
 /** returns the Client that owns the MenuItem. item must not be null */
 Client *menuitem_get_client(MenuItem *item);