Output option page: Fix incorrect tooltip for VMR-9 (renderless).

Fixes CID 966031.
switch statements: Document intentional fall through.

CID 966027, 966028, 966029, 966030, 1109593, 1129656, 1130513, 1130514, 1130739.
Use a bitcheck instead of casting (WIP).

Fixes CID #965944.