More Favourites! (Friends and more)

It would be awesome if there were a way to pin a friend to the top of your dms so whenever you go there you see them at the top. This could be implemented in an assortment of ways.

1. All friends who are favourites or pinned will be at the top of your dms list (this could be done with group chats too).

2. Have 3 categories within the top of the dms list. Such as General, Favourites, All. Similar to how some email services work. This could also be expanded to allow for other options such as a friends/non-friends tab.

3. Favourited friends appear just below all notifications and will automatically push to the top of there are no other notifications.

This would be very useful to help allow users to differentiate their dms and would also help those users who are just too popular and often forget to reply to one of our dms (we've all done it at somepoint)