* Load `JoinedRoom` in `HomeFlowNode.navigateToRoom`, then pass it to the next navigation nodes
* Add delayed loading indicator for cases when loading the room takes too long
* Avoid an extra FFI call in `RustRoomFactory`.
Use `RoomInfo.membership` instead.
Also use `computation` dispatcher, since it should reduce the delay when switching contexts.
* Remove the dispatcher usage when loading the room in `HomeFlowNode`, we immediately call a method that changes the dispatcher used
* Make sure only a single room is opened at a time
