food with 0% saturation should show that in the shift overlay

[wchristian]

Right now food with 0% saturation simply does not mention saturation at all.

This has the unfortunate side effect of never teaching newbies that saturation is a thing at all, or that saturation is in fact a value they can see ingame as on sandwiches.

Making even saturation 0% show on all other foods would lead to organic and emergent discovery of the mechanic.