message: Resolve thread from room Map rather than incorrect ref
diff: @@ -130,7 +130,7 @@ export default class ThreadView extends React.Component<IProps, IState> {
  };
  private setupThread = (mxEv: MatrixEvent) => {
  - let thread = mxEv.getThread();
  + let thread = this.props.room.threads.get(mxEv.getId());
  if (!thread) {
  const client = MatrixClientPeg.get();
  // Do not attach this thread object to the event for now
  