copy the current config when creating a pre-game config

I don't care either way but I guess this makes it more practical, because you can reset to defaults but you can't copy any other way (except for copy/pasting the *.ini files).
Rather than the defaults, this is "to the global settings" or something, right?

Also, does it require restarting the game?  I suppose it would currently?  I guess you could load the config right away in `RestoreDefaults()`.  Actually, I'm not sure why that wouldn't work for both paths (except resetting gpu backend...)

-[Unknown]