TapHandler: should not emit longPressed if the point is dragged

As long as the gesturePolicy is not DragThreshold, you can drag your finger or mouse around within the bounds of the parent Item and a long press will still be detected. If the gesturePolicy is ReleaseWithinBounds, you can even drag outside and still get a longPress. Maybe in a strict sense it's correct, but not sure if it makes sense in the real world: usually the idea is to stay in one place to trigger a long press.