message: Misc fixes to StatusMessageContextMenu
  "waiting" is not a property, and unmount had a typo
diff: @@ -25,8 +25,6 @@ export default class StatusMessageContextMenu extends React.Component {
  static propTypes = {
  // js-sdk User object. Not required because it might not exist.
  user: PropTypes.object,
  - // True when waiting for status change to complete.
  - waiting: false,
  };
  constructor(props, context) {
  @@ -45,7 +43,7 @@ export default class StatusMessageContextMenu extends React.Component {
  user.on("User._unstable_statusMessage", this._onStatusMessageCommitted);
  }
  - componentWillUmount() {
  + componentWillUnmount() {
  const { user } = this.props;
  if (!user) {
  return;
  