Prevent the deletion of a theme while it has an active child theme.

Fixes #29580
Props karpstrucking, jesin

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git-svn-id: http://core.svn.wordpress.org/trunk@30687 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Don't over-target buttons in the publish meta box.

This selector caused breakage for any custom buttons added.

props ericlewis.
fixes #30035.

Built from https://develop.svn.wordpress.org/trunk@30698


git-svn-id: http://core.svn.wordpress.org/trunk@30688 1a063a9b-81f0-0310-95a4-ce76da25c4cd
WPDB: When looking up the character set for a table or column, make sure we send the table name to MySQL in the correct case, as MySQL can be configured with case sensitive table names.

Fixes #30538.

Built from https://develop.svn.wordpress.org/trunk@30699


git-svn-id: http://core.svn.wordpress.org/trunk@30689 1a063a9b-81f0-0310-95a4-ce76da25c4cd