shouldComponentUpdate({ me: next }) {
    const { me } = this.props;
    return !(
      (me && me.id) === (next && next.id) &&
      (me && me.timeZone) === (next && next.timeZone)
    );
  }
Checks if user's profile settings (time zone etc.) are up-to-date,
and updates these fields in the background when they become outdated.