MenuItem: action can still be triggered with mouse when menuitem is disabled

import QtQuick 2.0
import QtQuick.Controls 1.0

ApplicationWindow {
    width: 360
    height: 360
    menuBar : MenuBar {
        id: menubar
        Menu {
            title: "&File"
            MenuItem {
                id: close
                text: "Close"
                shortcut: "Ctrl+Q"
                onTriggered: { Qt.quit()}
                enabled: false
            }
        }
    }
}