Pin of DMs or DM Ctaegories

It'd be cool to pin your best friends on top of over other dm's.

Another cool way would be to have 'DM Categories': Prioritise your best friends, have the general category of people you don't know and the trash section under others. A feature that only affects dm's and helps managing those by importance.

Unread messages would only stick inside each category, so if you have unread messages from categories below, you will still have your friends above those.