Current behavior:
When we delete an item (mark for deletion), the item could be published on the public instance. Only when the "publish deletion" action is triggered, then the item is removed from the public instance.

We want to combine the deletion with the unpublishing action, so that when the user trashes an item, the item also gets unpublished from the public instance.

3 cases needs to be addressed:

1. the item has not been published, or is unpublished (DRAFT status)
-> trashing will have no effect on the public; the restore action restores the last state of the item on the author.

2. the item has been published, and there are no changes on the author side (PUBLISHED status)
-> trashing will unpublish the item in the public; restore action restores the last state of the item on the author and will publish that item on the public

3. the item has been published and there are changes on the author side (MODIFED status)
-> trashing will unpublish the item in the public; restore action restores the last state of the item on the author(the modified state) and restores the last published version on the public