Item12639: rewrite of category UI using JSTreeContrib

... and various improvements



git-svn-id: http://svn.foswiki.org/trunk/ClassificationPlugin@17058 0b4bb1d4-4e5a-0410-9cc4-b2b747904278
Item12639: updating dependencies



git-svn-id: http://svn.foswiki.org/trunk/ClassificationPlugin@17059 0b4bb1d4-4e5a-0410-9cc4-b2b747904278