visionOS: Date picker Close/Reset buttons have no padding from the edge of the window
<rdar://problem/127908565>
Pull request: https://github.com/WebKit/WebKit/pull/28502
Committed 278727@main (2ab063ff7680): <https://commits.webkit.org/278727@main> Reviewed commits have been landed. Closing PR #28502 and removing active labels.