Improve some setting descriptions in the graphics options.

More than a few of these have annoyed me for a while, what with their typos and odd wording and occasional lack of important details.

Criticisms welcome. I mean, as long as it doesn't devolve into MORE bikeshedding. Even I don't enjoy that.
https://en.wikipedia.org/wiki/Fewer_vs._less
tl;dr, neither is really more correct, plus I'm not a fan of the "fewer" side, so I'm not touching this.