* Basic attempt at rewriting how the options menu works, move accessibility settings into their own tab.
* Audio tab uses the new options system.
* Rewrite Misc tab
* Clean up heading styling
* Rewrite options tab and other minor cleanup all over the place.
* Documentation comments and minor cleanup.
(cherry picked from commit 07fe1a6b5a0724a266e99781f697f423fe2badd5)
