message: RichCell: fix overflow & white-space
diff: }
  .RichCell--mult {
  - white-space: initial;
  + white-space: normal;
  }
  .RichCell__in {
  .RichCell--mult .RichCell__children,
  .RichCell--mult .RichCell__caption,
  .RichCell--mult .RichCell__text {
  - text-overflow: initial;
  + overflow: auto;
  }
  .RichCell__actions {
  