BUG: 243723 - Add a closeEvent to the mainwindow and stop the game there.
BUG: 243723 - Add a closeEvent to the mainwindow and stop the game there.

Signed-off-by: Laszlo Papp <0e4fea1ac22a8a678f85b8b38063f0adee7c6ced@archlinux.us>

pranavrc/example-gluon,pranavrc/example-gluon,KDE/gluon,pranavrc/example-gluon,KDE/gluon,KDE/gluon,KDE/gluon,pranavrc/example-gluon