The button has an incorrect background appearance in both dark and light mode - particularly when changing between dark/light mode. rdar://107157550
Pull request: https://github.com/WebKit/WebKit/pull/13087
Committed 263340@main (35779e4c19ae): <https://commits.webkit.org/263340@main> Reviewed commits have been landed. Closing PR #13087 and removing active labels.