Due to a change in NSPopoverColorWell's implementation, the layout of the color picker when suggested colors are specified is broken on 10.13.
Created attachment 348446 [details] Patch
Comment on attachment 348446 [details] Patch Clearing flags on attachment: 348446 Committed r235507: <https://trac.webkit.org/changeset/235507>
All reviewed patches have been landed. Closing bug.
<rdar://problem/43941959>