WM_CLOSE message to quit

[jjshade]

It would be great if alt+f4 would close the game from any point (without saving presumably). It's really annoying to have to go back through the menus just to exit.
Also a quickstart option like in Enter the Gungeon which lets you skip the warning and intro and menu and just resume your last saved data would be awesome.
I like to drop into a game and be able to be playing within a second or two wherever possible and to be able to get out again in less than a second if I'm not feeling it at the moment.

Thanks!