0028047: Visualization - support objects with customized highlighting in AIS_InteractiveContext

- SelectMgr_SelectableObject::ClearHighlighted method is added to remove dynamic highlight data;
- interactive context will pass processing of dynamic highlight erase to the object if the owner returns false in SelectMgr_EntityOwner::IsAutoHilight;
- if owner returns true in SelectMgr_EntityOwner::IsForcedHilight, selection presentation will be re-highlighted at each ::Select call;
- redundant logic related to old object-oriented highlight mechanism was removed from AIS_InteractiveContext::MoveTo.

src/SelectMgr/SelectMgr_SelectableObject.cxx

@@ -309,6 +309,15 @@ void SelectMgr_SelectableObject::ClearSelected ()
     mySelectionPrs->Clear();
 }
 
+//=======================================================================
+//function : ClearDynamicHighlight
+//purpose  :
+//=======================================================================
+void SelectMgr_SelectableObject::ClearDynamicHighlight (const Handle(PrsMgr_PresentationManager3d)& theMgr)
+{
+  theMgr->ClearImmediateDraw();
+}
+
 //=======================================================================
 //function : HilightOwnerWithColor
 //purpose  : 

src/SelectMgr/SelectMgr_SelectableObject.hxx

@@ -140,7 +140,14 @@ public:
   //! Method which clear all selected owners belonging
   //! to this selectable object ( for fast presentation draw )
   Standard_EXPORT virtual void ClearSelected();
-  
+
+  //! Method that needs to be implemented when the object
+  //! manages selection and dynamic highlighting on its own.
+  //! Clears or invalidates dynamic highlight presentation.
+  //! By default it clears immediate draw of given presentation
+  //! manager.
+  Standard_EXPORT virtual void ClearDynamicHighlight (const Handle(PrsMgr_PresentationManager3d)& theMgr);
+
   //! Method which hilight an owner belonging to
   //! this selectable object  ( for fast presentation draw )
   Standard_EXPORT virtual void HilightOwnerWithColor (const Handle(PrsMgr_PresentationManager3d)& thePM,