Includes miscellaneous bug fixes for 6.3 RC12. Props ramonopoly, audrasjb, swissspidy, peterwilsoncc, joemcgill. Fixes #58804. Built from https://develop.svn.wordpress.org/trunk@56298 git-svn-id: http://core.svn.wordpress.org/trunk@55810 1a063a9b-81f0-0310-95a4-ce76da25c4cd
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