Bug 237059 added the scrolling context menu items, let's finish this off!
<rdar://problem/98356019>
Pull request: https://github.com/WebKit/WebKit/pull/3131
Committed 253250@main (f45efb47d0b8): <https://commits.webkit.org/253250@main> Reviewed commits have been landed. Closing PR #3131 and removing active labels.