* Allow joined rooms to be pushed within a space.
* Push a room in the space flow tests.
Also fixes some snapshots stale snapshots.
* Show the selected space/room within a space and set a custom title view.
* Space flow improvements
- Use a state machine to select a space.
- Add a SpaceFlowCoordinator for recursively presenting subspaces.
- Get the spaceRoomListProxy when tapping on the space so we can indicate failures.
- Fix the total room count in SpaceListScreen.
* Refactor spaceRoom → spaceRoomProxy.
* Add a UI test for the Spaces flow.
