When Mail uses new wide-layout attachments, if there are two of them next to each other, they are flush (no gaps) and look like one big gray blob, it doesn't look good. rdar://108758307
Pull request: https://github.com/WebKit/WebKit/pull/13390
Committed 263654@main (b16028ac4f40): <https://commits.webkit.org/263654@main> Reviewed commits have been landed. Closing PR #13390 and removing active labels.