0028760: Visualization, TKOpenGl - avoid excessive frustum culling traverse within...

0028760: Visualization, TKOpenGl - avoid excessive frustum culling traverse within extra OIT rendering pass

Culling traverse is no more called implicitly within OpenGl_Layer::Render().
Instead, all layers are traversed at onces within OpenGl_View::render() beforehand.

OpenGl_BVHTreeSelector methods have been renamed to better reflect their meaning.
Non-persistent culling options has been moved to dedicated structure OpenGl_BVHTreeSelector::CullingContext
so that OpenGl_BVHTreeSelector instance can be used for different Layers without modifying its state.