Item12952: re-instate the BOOLGROUP type, which I erroneously thought was unused

git-svn-id: http://svn.foswiki.org/trunk@17848 0b4bb1d4-4e5a-0410-9cc4-b2b747904278
Item12952: re-instate the BOOLGROUP type, which I erroneously thought was unused

git-svn-id: http://svn.foswiki.org/trunk@17849 0b4bb1d4-4e5a-0410-9cc4-b2b747904278