Bug allows ListViews (Flickables?) to be draged too far past their bounds.

If you set a ListView to 'boundsBehavior: Flickable.DragAndOvershootBounds'. Scroll the list to the very end. Press on the final item and drag it to the top of the view. You get an empty area that fills about 50% of the screen. You need to be fast now, but if you quickly raise your finger and put it in the empty area and drag up you can lift the list even higher that 50%. If you keep on lifting and flicking you can almost make the list disappear at all. The extra presses in the empty area should be ignored or counted as if you were dragging on where the list returns to if you give it enough time to return. Being able to pull the list over 50% past its bounds looks ugly and ruins a number of behind the list effects.