code: def _create_action_create(self) -> QAction:
          
          icon = QIcon.fromTheme("document-new")
          action_create = QAction(icon, "New…", self)
          create_menu = QMenu(self)
          create_menu.insertActions(None, (  # "Insert before None", so append all items to the (empty) action list
              self.action_new_top_folder,
              self.action_new_sub_folder,
              self.action_new_phrase,
              self.action_new_script
          ))
          action_create.setMenu(create_menu)
          return action_create
docs: The action_create action contains a menu with all four "new" actions. It is inserted into the main window
          tool bar and lets the user create new items in the file tree.
          QtCreator currently does not support defining such actions that open a menu with choices, so do it in code.