Update the user model so it also sorts by power level and update how we initialize the model to improve performance.
The following is also changed:
- Store a single `UserListModel` in `RoomManager` and use it for everything, this means we don't create extra models (incluiding the long initialisation for each in big rooms)
- By using the single model once it has loaded the users of the new room opening and closing the draw now happens instantly (previously the model would have to be loaded every time the drawer was opened).
- To stop the initial loading and room change of Neochat slowing down (as the `UserListModel` would be loaded before the `TimelineView` is shown) the initialisation of the model is delayed until the `TimelineView` has loaded. This prioritises showing some messages in the timeline over populating the model so in large rooms the user list will initially be blank, but this keeps the initial load snappier.
Depends on https://github.com/quotient-im/libQuotient/pull/695
Currently basic just to show a working implementation using RoomMember. Currently only the room event and search models are moved over. Will change everything else over once the dependent pr is complete.
Document and cleanup userlist model.
- Remove unneeded enum UserTypes
- Cleanup includes and remove need to include QPointer
- make clear that it is a user or users that are being refreshed
Note: breaks libquotient 0.6 compatibility because of the changes to how m_currentRoom is handled
