Fix navigation in filtered trees
Fix navigation in filtered trees

close #272

dewhisna/fancytree,Koloto/fancytree,HobieCat/fancytree,Aliccer/fancytree,hglty07/fancytree,jiangjunt/fancytree,grandmanitou/fancytree,hglty07/fancytree,Koloto/fancytree,Mats0/fancytree,spilmert/fancytree,hglty07/fancytree,jiangjunt/fancytree,grandmanitou/fancytree,HobieCat/fancytree,Aliccer/fancytree,instein2014/JQuery,Mats0/fancytree,jiangjunt/fancytree,dewhisna/fancytree,Aliccer/fancytree,spilmert/fancytree,Koloto/fancytree,instein2014/JQuery,HobieCat/fancytree,spilmert/fancytree,dewhisna/fancytree,grandmanitou/fancytree