ENH: explicit selection of the secondary multivolume using the module GUI


git-svn-id: http://svn.slicer.org/Slicer4/trunk@22416 3bd1e089-480b-0410-8dfb-8563597acbee
ENH: adding default method for initializing of the node-specific display node


git-svn-id: http://svn.slicer.org/Slicer4/trunk@22420 3bd1e089-480b-0410-8dfb-8563597acbee