0030270: Modeling Algorithms - BRepBndLib should provide an option for skipping infinite entities

Bnd_Box now keeps calculating of finite part of bounding box after specifying it to be Open in some direction.
The finite part can be retrieved using new method Bnd_Box::FinitePart().

Prs3d::GetDeflection() now uses Bnd_Box::FinitePart() when applying relative deflection.

Draw Harness command bounding has been extended with option -finite returing a finite part of AABB.

tests/bugs/modalg_7/bug30270

@@ -0,0 +1,15 @@
+puts "========"
+puts "0030270: Modeling Algorithms - BRepBndLib should provide an option for skipping infinite entities"
+puts "========"
+puts ""
+
+pload MODELING VISUALIZATION
+restore [locate_data_file bug27448_b1255.brep] s
+bounding s -print
+bounding s -finite -shape b
+smallview
+donly b
+fit
+display s
+
+xwd ${imagedir}/${casename}.png