Twenty Thirteen: fix comment form layout for inline replies in wide viewports. Fixes #23524, props SriniG and obenland.

(Also fix an extra space that crept into r23461, see #23511.)


git-svn-id: http://core.svn.wordpress.org/trunk@23462 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Thirteen: show featured image on single posts, fixes #23528. Props kwight.


git-svn-id: http://core.svn.wordpress.org/trunk@23463 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Thirteen: fix typo in browser transition prefix. Fixes #23568, props Jayjdk.


git-svn-id: http://core.svn.wordpress.org/trunk@23464 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Thirteen: style the `hr` element. Fixes #23529.


git-svn-id: http://core.svn.wordpress.org/trunk@23465 1a063a9b-81f0-0310-95a4-ce76da25c4cd