* Introduce a hook to track active room
This hook simply keeps a state which tracks the index of the active room
in the list of rooms passed through props. This index will be recomputed
if the active rooms changes or if the list itself changed.
* Use hook in the view model
* Write tests
* Fix broken tests
* refactor: extract room creation and right verification
* refactor: update `RoomListHeaderViewModel` to use utils
* feat(room list filter): add filter key to `PrimaryFilter` model
* feat(room list filter): return active primary filter
* feat(room list): add create room action and rights verification
* test: update room list tests
* feat(empty room list): add empty room list
* test(empty room list): add empty room list tests
* feat(room list): use empty room list in `RoomListView`
* test(room list panel): update tests
* test(e2e): add e2e tests for empty room list
* test(e2e): update room list header snapshot
