Twenty Thirteen: minor tweaks and fixes, props obenland. Fixes #23698.

 * Add 1px to top margin for second level menus to align child menus with parent height
 * Remove text-decoration on hover for cancel-comment-reply-link
 * Pull floated images only in post content
 * Close edit link span element correctly

git-svn-id: http://core.svn.wordpress.org/trunk@23629 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Thirteen: align comment "bypostauthor" star correctly, props taupecat. Fixes #23696.

git-svn-id: http://core.svn.wordpress.org/trunk@23630 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Use auto-draft rather than post_ID = 0 to detect whether we are adding a new post. see #23665.



git-svn-id: http://core.svn.wordpress.org/trunk@23631 1a063a9b-81f0-0310-95a4-ce76da25c4cd