[Windows] Finishing system move activates the window even if Qt.WindowDoesNotAcceptFocus is set

Finishing system move activates the window even if Qt.WindowDoesNotAcceptFocus is set.

Code sample:

import QtQuick

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

    flags: Qt.WindowStaysOnTopHint | Qt.WindowDoesNotAcceptFocus

    DragHandler {
        target: null
        onActiveChanged: {
            console.log("Drag active: " + active)
            if (active)
                window.startSystemMove()
        }
    }

    TapHandler {
        onTapped: {
            console.log("Tapped")
        }
    }

    onActiveChanged: console.log("Window active: " + active)
}

Steps to reproduce:
1. Launch the sample and make the window inactive (e.g. by clicking outside)
2. Left-click inside this window and make sure that the window is still inactive (since Qt.WindowDoesNotAcceptFocus flag is set)
3. Move the window by dragging its content area (i.e, via startSystemMove())
4. Observe the window state

Actual result: The window became active.
Expected result: The window stays inactive, i.e. the same result as when clicking inside.