insert_action_text
Description:
Inserts an action in this’s action item list at position index_ with text text.
    
If you want the action item to have markup, use insert_action_markup.
Note that index_ is a relative position in the list of actions and the position of an action can change when deleting a different 
      action.
Parameters:
| this | |
| index_ | the index of the item to insert | 
| text | text of the item to insert |