message: Stop spinner on space preview if the join fails
diff: @@ -78,6 +78,7 @@ import { CreateEventField, IGroupSummary } from "../views/dialogs/CreateSpaceFro
  import { useAsyncMemo } from "../../hooks/useAsyncMemo";
  import Spinner from "../views/elements/Spinner";
  import GroupAvatar from "../views/avatars/GroupAvatar";
  +import { useDispatcher } from "../../hooks/useDispatcher";
  interface IProps {
  space: Room;
  @@ -191,6 +192,11 @@ interface ISpacePreviewProps {
  const SpacePreview = ({ space, onJoinButtonClicked, onRejectButtonClicked }: ISpacePreviewProps) => {
  const cli = useContext(MatrixClientContext);
  const myMembership = useMyRoomMembership(space);
  + useDispatcher(defaultDispatcher, payload => {
  + if (payload.action === Action.JoinRoomError && payload.roomId === space.roomId) {
  + setBusy(false); // stop the spinner, join failed
  + }
  + });
  const [busy, setBusy] = useState(false);
  