ENH: add view node combo box for models

Gives users a GUI element to set models visible in selected
views. 
Updated the displayable manager so that the model slice intersection
honors the overall display node visibility setting.

Issue #3216



git-svn-id: http://svn.slicer.org/Slicer4/trunk@23098 3bd1e089-480b-0410-8dfb-8563597acbee