docs: def remove_action(self, action, sub_menu='Advanced'):
          """
          Removes an action/separator from the editor's context menu.
  
          :param action: Action/seprator to remove.
          :param advanced: True to remove the action from the advanced submenu.
          """
          if sub_menu:
              try:
                  mnu = self._sub_menus[sub_menu]
              except KeyError:
                  pass
              else:
                  mnu.removeAction(action)
          else:
              try:
                  self._actions.remove(action)
              except ValueError:
                  pass
          self.removeAction(action)