Update vtkPVRenderViewSettings coincident geometry default to OFFSET_FACES.
Paraview and VTK changed how coincident geometries are handled, which broke CMB's use of model vertex, edge and face. In CMB, we expect the rendering order is face, edge, vertex, with vertex always on top of edge, edge always on top of face. This commit fixes vertex and edge are always on top of face, but we still need to figure out how to render vertex always on top of edge.