message: ModalDismissButton: another misplacement fix variant
diff: .ModalDismissButton {
  position: absolute;
  + justify-content: center;
  width: 28px;
  height: 28px;
  top: 14px;
  + padding: 4px;
  box-sizing: border-box;
  background-color: rgba(0, 0, 0, .35);
  color: var(--white);
  border-radius: 50%;
  right: -42px;
  - display: flex;
  - align-items: center;
  - justify-content: center;
  + transition: opacity .15s ease-out;
  +}
  +
  +.ModalDismissButton .Icon {
  + -webkit-transform: translateX(0);
  }
  .ModalDismissButton--ios {
  }
  .ModalDismissButton.Tappable--shadowHovered {
  - filter: opacity(.6);
  + opacity: .6;
  }
  .ModalDismissButton.Tappable--shadowHovered.Tappable--active {
  - filter: opacity(1);
  + opacity: 1;
  }
  