docs: def on_remove(self, widget, data=None):
          """Removes respective selected core elements and select the next one"""
  
          path_list = None
          if self.view is not None:
              model, path_list = self.tree_view.get_selection().get_selected_rows()
          old_path = self.get_path()
          models = [self.list_store[path][self.MODEL_STORAGE_ID] for path in path_list] if path_list else []
          if models:
              try:
                  self.remove_core_elements(models)
              except AttributeError as e:
                  self._logger.warning("The respective core element of {1}.list_store couldn't be removed. -> {0}"
                                    "".format(e, self.__class__.__name__))
              if len(self.list_store) > 0:
                  self.tree_view.set_cursor(min(old_path[0], len(self.list_store) - 1))
              return True
          else:
              self._logger.warning("Please select an element to be removed.")