MultiSelect and Drag&Drop
=========================
 Drag&Drop  TDBGridPro     
 DragMode, OnStartDrag, OnDragDrop  ..


TDBGridPro.MultiSelect -     ,
    CONTROL  SHIFT.


TDBGridPro.OnSelectionChange - ,     
   ,     
  (MultiSelect = true).


TDBGridPro.OptionsBehavior
  gboNoIncomingDragTrack -   ,  
      . ,    Drag&Drop 
     control.

  gboNoInsideDragTrack -   ,  
      . ,    Drag&Drop 
    .
