Feature request: set topic to moderation (or private) when WP post is saved in draft

I set my old PW post in draft mode to hide them from my site (still accessible through its slug though). As the WP post is cross posted to a topic I would like to see the topic being set to moderation mode (to hide it form normal users) or to set the topic as private. IMHO setting it to private is the better option as this distinguishes from trashed posts (where the topic is set to moderation)