SelectMgr → gp Relation

File in src/SelectMgr	Includes file in src/gp
SelectMgr_BaseFrustum.hxx	gp_GTrsf.hxx
SelectMgr_Frustum.hxx	gp_Pnt.hxx
SelectMgr_Frustum.hxx	gp_Vec.hxx
SelectMgr_Frustum.hxx	gp_XYZ.hxx
SelectMgr_VectorTypes.hxx	gp_Trsf.hxx