Popups not restoring focus to the children of Window contentItem upon closing

else if (window)
     window->contentItem()->setFocus(true);

import QtQuick 2.12
import QtQuick.Layouts 1.12
import QtQuick.Window 2.12
import QtQuick.Controls 2.12

Window {
    id: window
    visible: true
    width: 400
    height: 200

    onActiveFocusItemChanged: print("activeFocusItem", activeFocusItem)

    FocusScope {
        id: focusScope
        focus: true
        anchors.fill: parent
        objectName: "test"

        onFocusChanged: print("focus", focus)

        property bool toggled: false
        onToggledChanged: print("toggled", toggled)

        Keys.onPressed: {
            if (event.modifiers === Qt.AltModifier) {
                focusScope.toggled = true;
            }
        }
        Keys.onReleased: {
            if ((event.modifiers === Qt.AltModifier || event.key === Qt.Key_Alt) && !event.isAutoRepeat) {
                focusScope.toggled = false;
            }
        }

        RowLayout {
            anchors.centerIn: parent

            Button {
                text: qsTr("File")
                onClicked: fileMenu2.open()
                focusPolicy: Qt.NoFocus

                Menu {
                    id: fileMenu2
                    y: parent.height

                    MenuItem {
                        text: qsTr("New")
                    }
                    MenuItem {
                        text: qsTr("open")
                    }
                    MenuItem {
                        text: qsTr("Close")
                    }
                }
            }
            Button {
                id: penButton
                text: qsTr("Pen")
                highlighted: !focusScope.toggled
            }
            Button {
                id: eyedropperButton
                text: qsTr("Eyedropper")
                highlighted: focusScope.toggled
            }
        }
    }

    /* KLUDGE: Popup items will give focus to sibling overlay - we need to
     * restore keyboard bindings to focusScope when the popup(s) are gone
     * i.e. when overlay is invisible.
    Connections {
        target: window.Overlay.overlay
        onVisibleChanged: {
            if (!window.Overlay.overlay.visible) {
                focusScope.focus = true;
            }
        }
    }
     */
}