Qt Labs Platform MenuItem shortcut doesn't trigger

import QtQuick 2.5
import QtQuick.Controls 2.1
import Qt.labs.platform 1.0

ApplicationWindow {
    id: window
    visible: true
    width: 640
    height: 480
    title: qsTr("Hello World")

    MenuBar {
        Menu {
            title: qsTr("Format")

            MenuItem {
                text: qsTr("Bold")
                shortcut: StandardKey.Bold
//                shortcut: "Ctrl+B"
                onTriggered: print("hello")
            }
        }
    }
}