message: Hide user menu if empty
  If no actions are available in the user menu, hide the dropdown (but
  still show the username).
diff: @@ -23,6 +23,10 @@ const UserMenu: React.StatelessComponent<UserMenuProps> = ({username, actions})
  <i className="fa fa-user co-masthead__user-icon" aria-hidden="true"></i>
  <span className="co-masthead__username">{username}</span>
  </React.Fragment>;
  + if (_.isEmpty(actions)) {
  + return title;
  + }
  +
  return <ActionsMenu actions={actions}
  title={title}
  noButton={true} />;
  