[Enhancement] Make "Automatically save state on exit and load state on start" a 'Game-specific setting'

[NintendoManiac64]

There are quite a few games that I would prefer to not automatically use save-states and prefer to just rely on their battery saves, while there are other games I enjoy that don't even have battery saves and practically require the use of automatic save states.

So my idea is to simply make the "Automatically save state on exit and load state on start" setting be a 'Game-specific setting' setting instead.