Allow Flickable to ignore movement that may not be intended for it

The following code demonstrates the issue. It is easier to replicate with a touchscreen (where finger movement may not be as precise) than with a mouse.

import QtQuick 2.0

Flickable {
    width: 400; height: 400
    contentWidth: 800; contentHeight: 400
    flickableDirection: Flickable.HorizontalFlick

    Row {
        Repeater {
            model: 10
            delegate: Rectangle {
                width: 80; height: 400
                color: index % 2 ? "white" : "blue"
            }
        }
    }
}

With this code, a movement of 300 vertical pixels and 25 horizontal pixels (a vertical swipe which is not perfectly precise) will result in minor movement of the Flickable in the horizontal direction. In some cases this may not be the desired behavior.

It would be nice if this behavior was more configurable. This could perhaps be controlled by a bool property and/or threshold (e.g. don't allow horizontal movement if vertical movement was greater than horizontal movement, or if vertical movement was greater than 2 * horizontal movement, etc)