0032387: Visualization - use interface of ray-picking for selection/highlighting...

0032387: Visualization - use interface of ray-picking for selection/highlighting for XR pose

Fixed regression of SelectMgr_ViewerSelector::SetPixelTolerance(). Removed redundant myToUpdateTolerance flag.

SelectMgr_AxisIntersector::raySegmentDistance() - fixed usage of SquareModulus() instead of Modulus().
SelectMgr_ViewerSelector::TraverseSensitives() now skips both BVHSubset_2dPersistent and BVHSubset_3dPersistent relying on Camera.

AIS_ViewController::handleXRMoveTo() now uses interface for picking by Axis explicitly
instead of emulating axis by point picking.