Minor fixes to slice operations

Add the ability to import/export ForestIvy base spline plus minor fixes.

Improvements to rendering V-Ray Proxies in Vantage

Minor bug fixes

Minor fixes including issue that would cause the delete ket to stop working.

Fixes issues where the delete key would intermittently stop working

Minor fixes to V-Ray Proxies

Adds support for V-Ray 7

Adds support for V-Ray 7

Maintenance release fixing viewport lag and excess RAM usage