BUG: Restore slice views when building with VTK v5

Issue #3514

git-svn-id: http://svn.slicer.org/Slicer4/trunk@23126 3bd1e089-480b-0410-8dfb-8563597acbee
BUG: Fix uninitialized pointer in vtkMRMLModelDisplayDisplayableManager

git-svn-id: http://svn.slicer.org/Slicer4/trunk@23127 3bd1e089-480b-0410-8dfb-8563597acbee