message: onClick MELS avatars = expand MELS; fixes
diff: @@ -269,7 +269,7 @@ module.exports = React.createClass({
  );
  });
  return (
  - <span className="mx_MemberEventListSummary_avatars">
  + <span className="mx_MemberEventListSummary_avatars" onClick={ this._toggleSummary }>
  {avatars}
  </span>
  );
  