TinyMCE: update to 4.1.7, changelog: https://github.com/tinymce/tinymce/blob/master/changelog.txt. Fixes #30560.
Built from https://develop.svn.wordpress.org/trunk@30675


git-svn-id: http://core.svn.wordpress.org/trunk@30665 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Improve various `@param` docs for `src/wp-includes/class-wp-customize*.php`.

See #30224.

Built from https://develop.svn.wordpress.org/trunk@30676


git-svn-id: http://core.svn.wordpress.org/trunk@30666 1a063a9b-81f0-0310-95a4-ce76da25c4cd