code: function purgeHotkeys() {
          var i = scope.hotkeys.length;
          while (i--) {
            var hotkey = scope.hotkeys[i];
            if (hotkey && !hotkey.persistent) {
              _del(hotkey);
            }
          }
        }
docs: Purges all non-persistent hotkeys (such as those defined in routes)
  
  Without this, the same hotkey would get recreated everytime
  the route is accessed.