message: more button by default has no tab index
diff: @@ -5,7 +5,7 @@ import classNames from "classnames";
  export default class MoreButton extends React.Component {
  render() {
  return (
  - <ActionButton {...this.props} className={classNames("si-more", this.props.className)} />// eslint-disable-line react/prop-types
  + <ActionButton tabIndex="-1" {...this.props} className={classNames("si-more", this.props.className)} />// eslint-disable-line react/prop-types
  );
  }
  }
  