Player is visible in background only when releasing the ALT button.

Maybe this is intentional design, but when ALT+Tab'ing through different applications, the player is only visible if you release the ALT button. This is a different behaviour than on Windows 7, where the player is visible in the background all the time.

To reproduce:
- Open attached project and launch scene "scene-spot"
- Make sure that the option for "Visible in background" is enabled
- Make sure that you also have other applications running on your Desktop
- Build and Run a Windows x86_64 standalone player
- ALT+Tab through the different applications
- Observe that the player is only visible in background if you release the ALT button