0024623: Visualization - improve selection mechanism

Redesign of selection mechanism:
- implemented 3-level BVH tree for selection;
- selection now calculates in 3D space;
- intersection tests were moved to SelectMgr_BaseFrustum descendants;
- removed .cdl files in Select3D and .cdl related to selection in MeshVS;
- SelectMgr_ViewerSelectors are now shared between local and global contexts;
- transformations of sensitive entities are now stored in SelectMgr_SelectableObject only. Sensitive entities are independent from transformations, it is applied to SelectMgr_SelectingVolumeManager instance only;
- connected and multiple connected interactive objects are now represented by their child objects only for SelectMgr_SelectionManager;
- if interactive object has child objects, they will be stored as separate objects in SelectMgr_SelectionManager now.
- test cases bugs/vis/bug24623_1, bug24623_2, bug24623_3, bug24623_4 to test performance and memory issues.

src/Select3D/Select3D_SensitiveGroup.lxx

@@ -14,14 +14,29 @@
 // Alternatively, this file may be used under the terms of Open CASCADE
 // commercial license or contractual agreement.
 
-inline  void Select3D_SensitiveGroup::Set(const Standard_Boolean MustMatchAllEntities) 
-{myMustMatchAll = MustMatchAllEntities;}
+//=======================================================================
+//function : SetMatchType
+//purpose  :
+//=======================================================================
+inline void Select3D_SensitiveGroup::SetMatchType (const Standard_Boolean theIsMustMatchAll)
+{
+  myMustMatchAll = theIsMustMatchAll;
+}
 
- 
-inline  Standard_Boolean Select3D_SensitiveGroup::MustMatchAll() const
-{return myMustMatchAll;}
+//=======================================================================
+//function : MustMatchAll
+//purpose  :
+//=======================================================================
+inline Standard_Boolean Select3D_SensitiveGroup::MustMatchAll() const
+{
+  return myMustMatchAll;
+}
 
-inline const Select3D_ListOfSensitive& Select3D_SensitiveGroup::GetEntities() const
-{return myList;}
-
- 
+//=======================================================================
+//function : GetEntities
+//purpose  :
+//=======================================================================
+inline const Select3D_EntitySequence& Select3D_SensitiveGroup::GetEntities() const
+{
+  return myEntities;
+}