Media modal: when inserting content, prefer the editor id passed while opening the modal. wpActiveEditor can change in the background. (Includes some precommit prefixed selectors.) Fixes #28173
Built from https://develop.svn.wordpress.org/trunk@29603


git-svn-id: http://core.svn.wordpress.org/trunk@29377 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Correct cascade oversights in form CSS. fixes #28262.

Built from https://develop.svn.wordpress.org/trunk@29604


git-svn-id: http://core.svn.wordpress.org/trunk@29378 1a063a9b-81f0-0310-95a4-ce76da25c4cd