Tooltips don't work well on the boundaries when a drawer is opened.
Created attachment 382123 [details] Patch
unofficially r=me
Comment on attachment 382123 [details] Patch rs=me
Created attachment 382264 [details] Patch for landing
Comment on attachment 382264 [details] Patch for landing Clearing flags on attachment: 382264 Committed r251763: <https://trac.webkit.org/changeset/251763>
All reviewed patches have been landed. Closing bug.
<rdar://problem/56732041>