message: button this fix
diff: @@ -27,8 +27,7 @@ const mapOldLevel = level => {
  const Button = props => {
  if (props.type === 'cell') {
  - const { ...restProps } = this.props;
  - return <CellButton {...restProps} />;
  + return <CellButton {...props} />;
  } else {
  const { className, size, level, stretched, align, children, before, ...restProps } = props;
  