message: Fix event handler leak in MemberStatusMessageAvatar
  A typo led to an event handler leak with the custom status labs feature. A new
  handler would leak each time you change rooms, which can add up over the course
  of a long-lived session.
diff: @@ -63,7 +63,7 @@ export default class MemberStatusMessageAvatar extends React.Component {
  user.on("User._unstable_statusMessage", this._onStatusMessageCommitted);
  }
  - componentWillUmount() {
  + componentWillUnmount() {
  const { user } = this.props.member;
  if (!user) {
  return;
  