Accidental closing "bug"

[JoshuaJ]

Oops... an hour into my first game, things seemed to be going well,
and I went to click the "Menu" button in the top-left corner of the
window to save my game. The "Menu" button, at least on the Mac
version, is only pixels away from the window's "Close" button. I
accidentally hit the "Close" button. Instantly, my game was gone.
There was no "Are you sure you want to quit?" dialog. There was no
"Save game before closing?" dialog. A simple confirmation would easily
save people like me from our own stupidity and prevent this from
happening again!

[evilmrhenry]

For now, note that you can turn on mouse grab in the options. (I assume
it works under mac...)