Fix for issue 4306 disabled 'Esc' and Android 'Back' from exiting paused state

[naoan]

Agree, this is also very very annoying in windows, any chance to change it back to old behavior? I understand that disabling back on android phone make sense but there's little chance for anyone to mishit esc key in windows or on android console like ouya so I hope the devs could at least change it back on windows or make it configurable for every platform.