fix typeo

git-svn-id: http://svn.krangcms.com/trunk/krang@6902 689d98c0-9023-0410-9c0b-f79783857903
adding a way to email site administrator about missing help topics (from Ajax in our extension).

git-svn-id: http://svn.krangcms.com/trunk/krang@6903 689d98c0-9023-0410-9c0b-f79783857903