More Moderation tweaks (#2566)

* Show room member role changes in the timeline.

* Fix a bug in room flow coordinator.

* Tidy up roles and permissions flow.

* Refresh the power levels in the room details screen.

* Automatically update permissions after saving.

* Remove extra button.

* Add a short delay to the roles and permissions screen snapshots.
The permissions rows are now in a loading state initially.

ElementX/Sources/Screens/RoomChangePermissionsScreen/RoomChangePermissionsScreenModels.swift

@@ -18,7 +18,7 @@ import Foundation
 import MatrixRustSDK
 
 enum RoomChangePermissionsScreenViewModelAction {
-    case cancel
+    case complete
 }
 
 struct RoomChangePermissionsScreenViewState: BindableState {