Implement the SpaceAddRoomsScreen. (#4951)

* Update proxies ready for adding rooms to a space.

- ClientProxy.recentlyVisitedRooms to take a filter and to return room proxies.
- Expose SpaceServiceProxy.addChildToSpace.

* Implement the SpaceAddRoomsScreen.

* Fix the designs of the selected carousels.

Add more snapshot tests for inviting users.

* Fix for screen using wrong avatar size.

ElementX/Sources/Screens/InviteUsersScreen/InviteUsersScreenViewModel.swift

@@ -69,11 +69,10 @@ class InviteUsersScreenViewModel: InviteUsersScreenViewModelType, InviteUsersScr
     
     private func toggleUser(_ user: UserProfileProxy) {
         if state.selectedUsers.contains(user) {
-            state.scrollToLastID = nil
             state.selectedUsers.removeAll { $0.userID == user.userID }
         } else {
-            state.scrollToLastID = user.userID
             state.selectedUsers.append(user)
+            withElementAnimation(.easeInOut) { state.bindings.selectedUsersPosition = user.userID }
         }
     }