[FIX] board: prevent crash if no action

If the user tries to save on the dashboard a view which was not open
through an existing action, the call to method `add_to_dashboard`
crashes because of incorrect arguments (`action_id` is undefined in JS).

This is for example the case when trying to save an "Inventory at Date"
in the dashboard (will be fixed in a subsequent commit).

opw-703649

addons/board/controllers.py

@@ -13,7 +13,7 @@ class Board(Controller):
         # Retrieve the 'My Dashboard' action from its xmlid
         action = request.env['ir.model.data'].get_object('board', 'open_board_my_dash_action')
 
-        if action and action['res_model'] == 'board.board' and action['views'][0][1] == 'form':
+        if action and action['res_model'] == 'board.board' and action['views'][0][1] == 'form' and action_id:
             # Maybe should check the content instead of model board.board ?
             view_id = action['views'][0][0]
             board = request.env[action['res_model']].fields_view_get(view_id, 'form')

addons/board/static/src/js/dashboard.js

@@ -405,7 +405,7 @@ FavoriteMenu.include({
             name = self.$add_dashboard_input.val();
         
         return self.rpc('/board/add_to_dashboard', {
-            action_id: self.action_id,
+            action_id: self.action_id || false,
             context_to_save: c,
             domain: d,
             view_mode: self.view_manager.active_view.type,