0027816: Visualization - provide an API for overriding clipping planes list

Graphic3d_SequenceOfHClipPlane now inherits Standard_Transient.
PrsMgr_PresentableObject, Graphic3d_Structure, Graphic3d_CStructure,
V3d_View, OpenGl_View now manages the plane list by Handle.
The getters ::GetClipPlanes() has been removed,
setters taking non-handle ::SetClipPlanes() has been marked deprecated.

OpenGl_Structure::Render() and SelectMgr_ViewerSelector::checkOverlap()
now disable global (view) clipping planes for objects
with flags Graphic3d_TMF_TriedronPers and Graphic3d_TMF_2d
or with new flag Graphic3d_SequenceOfHClipPlane::ToOverrideGlobal().

OpenGl_Clipping now implements interface for managing clipping planes
without copying the sequences.
The filtering of duplicates is no more performed by OpenGl_Clipping
- application is responsible to not do this.
OpenGl_Clipping tries avoiding unnecessary allocations for managing
list of active planes.

MFC sample has been updated to use V3d_View::ClipPlanes() method.

src/StdSelect/StdSelect_ViewerSelector3d.cxx

@@ -128,7 +128,7 @@ void StdSelect_ViewerSelector3d::Pick (const Standard_Integer theXPix,
   gp_Pnt2d aMousePos (static_cast<Standard_Real> (theXPix),
                       static_cast<Standard_Real> (theYPix));
   mySelectingVolumeMgr.BuildSelectingVolume (aMousePos);
-  mySelectingVolumeMgr.SetViewClipping (theView->GetClipPlanes());
+  mySelectingVolumeMgr.SetViewClipping (theView->ClipPlanes());
 
   TraverseSensitives();
 }
@@ -644,7 +644,8 @@ Standard_Boolean StdSelect_ViewerSelector3d::HasDepthClipping (const Handle(Sele
   }
 
   const Handle(SelectMgr_SelectableObject)& aSelectable = theOwner->Selectable();
-  return (aSelectable->GetClipPlanes().Size() > 0);
+  return !aSelectable->ClipPlanes().IsNull()
+      && !aSelectable->ClipPlanes()->IsEmpty();
 }
 
 //=======================================================================