Reduce the settings and possible actions in Direct Chats
Direct Chats are only supposed to be private 1-to-1 rooms. Currently they allow the same actions as other rooms, but some of them don't make sense for their use case.
- Editing the room topic (editing the room name might have a use if the user wants to have an easier name to find the room).
- Having a separate members list: since there are only two members it doesn't seem useful.
- Inviting new users: it could be replaced by a feature that creates a new room with the proper invites.
- Changing the visibility/access to something public.
- Adding public addresses.
- Seeing/changing the permissions: it is of little interest since both users are supposed to be admin.