message: add nop to fix `onClick` being required warning
diff: @@ -22,6 +22,7 @@ import sdk from '../../../index';
  import dis from '../../../dispatcher';
  import FlairStore from '../../../stores/FlairStore';
  +function nop() {}
  const GroupTile = React.createClass({
  displayName: 'GroupTile',
  @@ -81,7 +82,7 @@ const GroupTile = React.createClass({
  ) : null;
  // XXX: Use onMouseDown as a workaround for https://github.com/atlassian/react-beautiful-dnd/issues/273
  // instead of onClick. Otherwise we experience https://github.com/vector-im/riot-web/issues/6156
  - return <AccessibleButton className="mx_GroupTile" onMouseDown={this.onMouseDown}>
  + return <AccessibleButton className="mx_GroupTile" onMouseDown={this.onMouseDown} onClick={nop}>
  <Droppable droppableId="my-groups-droppable" type="draggable-TagTile">
  { (droppableProvided, droppableSnapshot) => (
  <div ref={droppableProvided.innerRef}>
  