The bulk editor and post format meta box should use the same checks for available post formats.

Props eightface.
Fixes #27187.


Built from https://develop.svn.wordpress.org/trunk@27762


git-svn-id: http://core.svn.wordpress.org/trunk@27599 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Thirteen and Fourteen: implement HTML5 markup for galleries (see #26697) and captions (see #26642). Props obenland, closes #27502.
Built from https://develop.svn.wordpress.org/trunk@27763


git-svn-id: http://core.svn.wordpress.org/trunk@27600 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Add the 'attachment_' prefix to caption IDs after editing, see #24409
Built from https://develop.svn.wordpress.org/trunk@27764


git-svn-id: http://core.svn.wordpress.org/trunk@27601 1a063a9b-81f0-0310-95a4-ce76da25c4cd