Drawer doesn't detect swipe velocity

When closing the Drawer by swiping/flicking fast, it sometimes fails to detect the correct direction if the position of the control doesn't exceed certain limit (0.7). It should detect the swipe velocity and close appropriately, when the user clearly means to close the drawer.

Note: QQuickDrawerPrivate::handleMouseReleaseEvent() has some code commented out that originates somewhere from QQuickFlickable or friends, but the velocity capability is not available on Android at least:

• QTouchDevice::Velocity
• QGuiApplicationPrivate::mouseEventCaps()
• QGuiApplicationPrivate::mouseEventVelocity()