PubSub tree based on nodeid insteed of attribut 'node' of query xml
In order to get tree of collection/leaf node in pubsub (XEP60), Gajim set 'home/child' nodeid as child of 'home' nodeid. But XEP60 defined that parent of node is defined on 'node' attribut of query stanza. (see example 12 on XEP )