Fix object name. props GaryJ. see #14045.

git-svn-id: https://core.svn.wordpress.org/trunk@23760 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Use placeholders in menu strings instead of manual concatenation. fixes #14045.

git-svn-id: https://core.svn.wordpress.org/trunk@23761 1a063a9b-81f0-0310-95a4-ce76da25c4cd