Update DropInfo.cs
Update DropInfo.cs

if VisualTarget is not ItemsControl then VisualTargetItem = VisualTarget.
Allows HighlightAdorner to be used in IDropTarget.Drag.
Livit/Mailbird.Gong.WPF.DragDrop,Haukinger/gong-wpf-dragdrop,punker76/gong-wpf-dragdrop,emsaks/gong-wpf-dragdrop