Item12515: refined interface to support checkers better. Really need to move to a tabbed interface.

git-svn-id: http://svn.foswiki.org/trunk/ConfigurePlugin@17108 0b4bb1d4-4e5a-0410-9cc4-b2b747904278
Item12515: prettify it a bit

git-svn-id: http://svn.foswiki.org/trunk/ConfigurePlugin@17109 0b4bb1d4-4e5a-0410-9cc4-b2b747904278