message: Give flair avatars a tooltip = the group ID
diff: @@ -157,7 +157,12 @@ class FlairAvatar extends React.Component {
  render() {
  const httpUrl = this.context.matrixClient.mxcUrlToHttp(
  this.props.groupProfile.avatarUrl, 14, 14, 'scale', false);
  - return <img src={httpUrl} width="14px" height="14px" onClick={this.onClick}/>;
  + return <img
  + src={httpUrl}
  + width="14px"
  + height="14px"
  + onClick={this.onClick}
  + title={this.props.groupProfile.groupId} />;
  }
  }
  