8000422: [macosx] Views keep scrolling back to the drag position after DnD

Reviewed-by: serb, anthony

src/macosx/classes/sun/lwawt/macosx/CDropTargetContextPeer.java

@@ -38,7 +38,7 @@ final class CDropTargetContextPeer extends SunDropTargetContextPeer {
     private long    fNativeDropTransfer = 0;
     private long    fNativeDataAvailable = 0;
     private Object  fNativeData    = null;
-    private boolean insideTarget = false;
+    private boolean insideTarget = true;
 
     Object awtLockAccess = new Object();