MouseWheel can push Flickable beyond the overshoot bound

Using the Mouse Wheel, at high velocities I manage to push the Flickable list beyond the overshoot boundary.

Steps to reproduce :
1. Run the code below in qmlviewer.exe
2. Try to flick down the list using the mouse wheel, then flick up quickly.
3. Observe that you can move the list up so as to push everything off screen, far more than the hardcoded overshoot limit (see attached video).

import QtQuick 2.0
Rectangle {
	width: 200
	height: 200

	Flickable {
		anchors.fill: parent
		contentHeight: contentItem.childrenRect.height

		Column {
			Repeater {
				model:  200
				Text {text: "item" + index}
			}
		}
	}
}