Surface LIC Plugin : Expose new surface lic features

Updates to the GUI files to expose new VTK surface lic
features in PV. Adds support for IceT render empty
images.

Change-Id: Ib282b5d283c010f5aff5393e974151310a6c44c2
Merge topic 'parallel-surface-lic-pv' into next

583de33 Surface LIC Plugin : Expose new surface lic features