[53377] Included cherry-picked commits from the Gutenberg plugin that fix bugs discovered after WordPress 6.0 RC 1.
[53378] Includes cherry-picked commit from the Gutenberg plugin that fix a bug discovered just before WordPress 6.0 RC 2.
Props zieladam, ndiego, kebbet, hellofromTonya.
Merges [53377] and [53378] to the 6.0 branch.
Fixes#55567.
Built from https://develop.svn.wordpress.org/branches/6.0@53381
git-svn-id: http://core.svn.wordpress.org/branches/6.0@52970 1a063a9b-81f0-0310-95a4-ce76da25c4cd