Verify tags used in the gallery shortcode.



git-svn-id: http://core.svn.wordpress.org/branches/3.5@23317 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Use correct escaping function. props duck_.



git-svn-id: http://core.svn.wordpress.org/branches/3.5@23322 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Core Update: Fix a issue which caused automatic upgrades from 2.7 to 3.5+ to fail. Pre-2.7 WP_Filesystem::wp_content_dir() returned unslashed paths. Introduced in [22227].

Merges [23297] to the 3.5 branch.

props dd32
fixes #23177



git-svn-id: http://core.svn.wordpress.org/branches/3.5@23324 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Main editor: when setting or saving the height, look only at elements that have style="height:..." set. Reset a previously saved erroneous "ed_size" value (over 5000px) to the default height of 360px. Fixes #23042 for 3.5.

git-svn-id: http://core.svn.wordpress.org/branches/3.5@23326 1a063a9b-81f0-0310-95a4-ce76da25c4cd