Item12805: fixed sub-hashes like {Site}{CharSet} not being parseed properly

This reverts part of changeset 17320. See http://trac.foswiki.org/changeset/17320/trunk/core/lib/Foswiki/Query/Node.pm



git-svn-id: http://svn.foswiki.org/trunk/core@17409 0b4bb1d4-4e5a-0410-9cc4-b2b747904278