message: Prevent click fallthrough
diff: }
  .HorizontalScrollArrow--left {
  - margin-left: 16px;
  + padding-left: 16px;
  left: 0;
  }
  }
  .HorizontalScrollArrow--right {
  - margin-right: 16px;
  + padding-right: 16px;
  right: 0;
  }
  