TinyMCE: fix icons in IE7, fixes #27829
Built from https://develop.svn.wordpress.org/trunk@28142


git-svn-id: http://core.svn.wordpress.org/trunk@27973 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Widgets: Remove create_function() from the customizer class.

props westonruter.
fixes #27805.

Built from https://develop.svn.wordpress.org/trunk@28143


git-svn-id: http://core.svn.wordpress.org/trunk@27974 1a063a9b-81f0-0310-95a4-ce76da25c4cd