message: Banner: fixed css order
diff: color: var(--icon_tertiary);
  }
  -.Banner--android.Banner--md-image .Banner__dismissIcon {
  - color: var(--white);
  -}
  -
  .Banner__dismissIcon:active {
  opacity: .4;
  }
  .Banner--android .Banner__in {
  border-radius: 8px;
  }
  +
  +.Banner--android.Banner--md-image .Banner__dismissIcon {
  + color: var(--white);
  +}
  