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.
+1, from me. XFB/EFB are extremely common abbreviations (including in Nintendo's own software, btw) and having the matching abbreviation in the UI thus seems very important to me.