message: Fix useRoomPowerLevels hook
diff: @@ -24,6 +24,7 @@ import {RoomMember} from 'matrix-js-sdk/src/models/room-member';
  import {User} from 'matrix-js-sdk/src/models/user';
  import {Room} from 'matrix-js-sdk/src/models/room';
  import {EventTimeline} from 'matrix-js-sdk/src/models/event-timeline';
  +import {MatrixEvent} from 'matrix-js-sdk/src/models/event';
  import dis from '../../../dispatcher/dispatcher';
  import Modal from '../../../Modal';
  @@ -496,11 +497,11 @@ const isMuted = (member: RoomMember, powerLevelContent: IPowerLevelsContent) =>
  export const useRoomPowerLevels = (cli: MatrixClient, room: Room) => {
  const [powerLevels, setPowerLevels] = useState<IPowerLevelsContent>({});
  - const update = useCallback(() => {
  - if (!room) {
  - return;
  - }
  - const event = room.currentState.getStateEvents("m.room.power_levels", "");
  + const update = useCallback((ev?: MatrixEvent) => {
  + if (!room) return;
  + if (ev && ev.getType() !== EventType.RoomPowerLevels) return;
  +
  + const event = room.currentState.getStateEvents(EventType.RoomPowerLevels, "");
  if (event) {
  setPowerLevels(event.getContent());
  } else {
  @@ -511,7 +512,7 @@ export const useRoomPowerLevels = (cli: MatrixClient, room: Room) => {
  };
  }, [room]);
  - useEventEmitter(cli, "RoomState.members", update);
  + useEventEmitter(cli, "RoomState.events", update);
  useEffect(() => {
  update();
  return () => {
  