Fix move/copy between different hierarchy widgets
Fix move/copy between different hierarchy widgets

jbeezley/girder,opadron/girder,salamb/girder,RafaelPalomar/girder,data-exp-lab/girder,Xarthisius/girder,kotfic/girder,manthey/girder,Kitware/girder,adsorensen/girder,manthey/girder,data-exp-lab/girder,opadron/girder,kotfic/girder,Xarthisius/girder,essamjoubori/girder,data-exp-lab/girder,adsorensen/girder,essamjoubori/girder,msmolens/girder,Xarthisius/girder,RafaelPalomar/girder,sutartmelson/girder,adsorensen/girder,opadron/girder,RafaelPalomar/girder,salamb/girder,jcfr/girder,girder/girder,jcfr/girder,kotfic/girder,Xarthisius/girder,jcfr/girder,msmolens/girder,chrismattmann/girder,sutartmelson/girder,RafaelPalomar/girder,chrismattmann/girder,sutartmelson/girder,jcfr/girder,Kitware/girder,girder/girder,opadron/girder,jbeezley/girder,essamjoubori/girder,adsorensen/girder,salamb/girder,manthey/girder,jbeezley/girder,kotfic/girder,Xarthisius/girder,msmolens/girder,data-exp-lab/girder,girder/girder,opadron/girder,msmolens/girder,girder/girder,chrismattmann/girder,sutartmelson/girder,salamb/girder,sutartmelson/girder,Kitware/girder,essamjoubori/girder,jcfr/girder,chrismattmann/girder,salamb/girder,jbeezley/girder,manthey/girder,kotfic/girder,data-exp-lab/girder,essamjoubori/girder,Kitware/girder,RafaelPalomar/girder,msmolens/girder,chrismattmann/girder,adsorensen/girder