Regression: Keyboard input unusable with redirected Qt Quick scenes (QQuickRenderControl)

In addition, basic input event forwarding is also demonstrated. When holding down the left mouse button, the background Rectangle color is altered via QML bindings. Similarly, holding down a key on the keyboard changes the color as well. This proves that the "fake" events sent from the application (generated based on events from the on-screen QWindow) are forwarded and processed within the Qt Quick scene.

    gradient: Gradient {
        GradientStop { position: 0; color: mouse.pressed ? "lightsteelblue" : (root.keyDown ? "blue" : "steelblue") }
        GradientStop { position: 1; color: "black" }
    }
   ...
    Keys.onPressed: keyDown = true
    Keys.onReleased: keyDown = false

void WindowSingleThreaded::keyPressEvent(QKeyEvent *e)
{
    QCoreApplication::sendEvent(m_quickWindow, e);
}

void WindowSingleThreaded::keyReleaseEvent(QKeyEvent *e)
{
    QCoreApplication::sendEvent(m_quickWindow, e);
}