Adding polymorphic belongs_to for menuable elements attached to a menu_item
Added page resource for testing purposes
Relating page and menu_item by hand
Merge branch 'features/menu-item-attached-to-object'
Migration and schema for menu_action
Merge branch 'features/menu-item-attached-to-action'
Adding translated external url to menu item
Merge branch 'features/menu-item-attached-to-external-url'