Twenty Twelve: Use the correct body class for attachments.

.single-attachment is only used when the attachment's parent is not a page.

props Marco_Teethgrinder.
fixes #25506.

Built from https://develop.svn.wordpress.org/trunk@25707


git-svn-id: http://core.svn.wordpress.org/trunk@25621 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Optimize the accessibility JS on the Menus screen to avoid browser crashes with very large menus.

props atimmer.
fixes #25112.

Built from https://develop.svn.wordpress.org/trunk@25708


git-svn-id: http://core.svn.wordpress.org/trunk@25622 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Move the trim() from wp_set_password() to inside wp_hash_password().

props rpattillo, joehoyle.
fixes #24973. see #23494.

Built from https://develop.svn.wordpress.org/trunk@25709


git-svn-id: http://core.svn.wordpress.org/trunk@25623 1a063a9b-81f0-0310-95a4-ce76da25c4cd