message: Don't show a 'show less' button when it's impossible to collapse
  Fixes
diff: @@ -359,7 +359,7 @@ export default class RoomSublist2 extends React.Component<IProps, IState> {
  {showMoreText}
  </div>
  );
  - } else if (tiles.length <= nVisible) {
  + } else if (tiles.length <= nVisible && tiles.length > this.props.layout.minVisibleTiles) {
  // we have all tiles visible - add a button to show less
  let showLessText = (
  <span className='mx_RoomSublist2_showNButtonText'>
  