[53402] Theme: Use a better method to determine the theme name during export
[53403] Editor: Update WordPress packages for 6.0 RC 3
[53404] Editor: Return additional block patterns to server-generated settings
Props SergeyBiryukov, scruffian, davidbaumwald, jeremyfelt, zieladam, ndiego, jsnajdr, peterwilsoncc, johnstonphilip.
Merges [53402], [53403] and [53404] to the 6.0 branch.
Fixes#55567.
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git-svn-id: http://core.svn.wordpress.org/branches/6.0@52994 1a063a9b-81f0-0310-95a4-ce76da25c4cd