Rearranged how style options appear in UI

- Now split into 3 cats instead of based on style (old way wasn't very
extensible):
- "All" are hard-coded values that apply to every style
(DLC2 cave, fixing portal bumping, no mid-chamber voices, allowing
deletion of mandatory items)
- "Selected Style" are values relevant to the chosen style
- "Other Styles" are values for other styles