Sitetree module: Deliver empty sitetree if no sitetree exists for an area, use page-envelope:language for icons instead of document-language
Sitetree module: Deliver empty sitetree if no sitetree exists for an area, use page-envelope:language for icons instead of document-language

git-svn-id: c334bb69c16d150e1b06e84516f7aa90b3181ca2@611213 13f79535-47bb-0310-9956-ffa450edef68

apache/lenya,apache/lenya,apache/lenya,apache/lenya