message: Banner: change div to button
diff: z-index: 2;
  width: 48px;
  height: 48px;
  - display: flex;
  - align-items: center;
  - justify-content: center;
  + margin: 0;
  + padding: 12px;
  color: var(--icon_tertiary);
  + border: none;
  + background-color: transparent;
  + cursor: pointer;
  }
  .Banner__dismissIcon:active {
  