Add a filter for attributes on menu item links. props simonwheatley, DrewAPicture, SergeyBiryukov, nacin. fixes #16738.

git-svn-id: https://core.svn.wordpress.org/trunk@23565 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Add missing comma. props bradparbs. fixes #22507.

git-svn-id: https://core.svn.wordpress.org/trunk@23566 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Use wp_unslash() instead of stripslashes() and stripslashes_deep(). Use wp_slash() instead of add_magic_quotes().


git-svn-id: https://core.svn.wordpress.org/trunk@23567 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Twelve: better handling for cases where a background color is set to white or an empty value (like first run with no `theme_mods` set) and a background image is enabled, which resulted previously in a broken layout. Fixes #23586, props obenland.

git-svn-id: https://core.svn.wordpress.org/trunk@23568 1a063a9b-81f0-0310-95a4-ce76da25c4cd