Control screensaver node does not work on iOS devices

If the user places a Control Screen Saver node set to false into his blueprint and then launches it to a mobile device, this node will not prevent the device from going to the screen saver.

1. Open the editor
2. Open the level blueprint
3. Connect a control screen saver node to tick and make sure allow screen saver is set to false
4. Compile and save
5. Launch on to a mobile device
6. Let the device set until the screen goes black and locks the device

Expected: The screen on the mobile device would never go black and lock
Result: The screen turns off