message: Make sure modal dialog appears over topbar header
diff: @@ -15,6 +15,7 @@ const ModalBackdrop = styled.div`
  left: 0;
  background-color: rgba(255, 255, 255, 0.9);
  z-index: 6001;
  + transform: translate3d(0, 0, 1px);
  `;
  export default class Modal extends Component {
  