JSHint fixes for editor.js. Props dougwollison, fixes #25947
Built from https://develop.svn.wordpress.org/trunk@26224


git-svn-id: http://core.svn.wordpress.org/trunk@26131 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Fourteen: limit back compat to 3.6 and later versions. See #26055, props obenland.
Built from https://develop.svn.wordpress.org/trunk@26225


git-svn-id: http://core.svn.wordpress.org/trunk@26132 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Fourteen: fix an issue with keyboard navigation where you couldn't navigate to the previous image. Props obenland, see #25946.
Built from https://develop.svn.wordpress.org/trunk@26226


git-svn-id: http://core.svn.wordpress.org/trunk@26133 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Fourteen: general cleanup for spacing, inline comments. Props obenland, see #25946.
Built from https://develop.svn.wordpress.org/trunk@26227


git-svn-id: http://core.svn.wordpress.org/trunk@26134 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Fix JSHint errors in shortcode.js.

props tommcfarlin.
fixes #25945.

Built from https://develop.svn.wordpress.org/trunk@26228


git-svn-id: http://core.svn.wordpress.org/trunk@26135 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Move media uploader responsive styles from wp-admin.css to media-views.css; clean up duplicated media queries. See #25977.
Built from https://develop.svn.wordpress.org/trunk@26229


git-svn-id: http://core.svn.wordpress.org/trunk@26136 1a063a9b-81f0-0310-95a4-ce76da25c4cd