Callback to show the rename tab dialog. Called by the accel
        key.

def accel_rename_current_tab(self, *args):
        """Callback to show the rename tab dialog. Called by the accel
        key.
        """
        page_num = self.get_notebook().get_current_page()
        page = self.get_notebook().get_nth_page(page_num)
        self.get_notebook().get_tab_label(page).on_rename(None)
        return True