Avoid PHP notices when deleting or restoring an item that no longer exists. props johnbillion, ocean90. fixes #24246.

git-svn-id: http://core.svn.wordpress.org/trunk@24201 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Thirteen: fix styling for comment moderation notice. Props SergeyBiryukov, fixes #24286.

git-svn-id: http://core.svn.wordpress.org/trunk@24202 1a063a9b-81f0-0310-95a4-ce76da25c4cd