Flatten the nested switches in UHCode.key_handlers into a single switch expression
Flatten the nested switches in UHCode.key_handlers into a single switch expression

Originally the check to see whether the event was a move, combo, or single key was done in an implied order, even though the order didn't matter. Now it's all done together.

hazelgrove/hazel,hazelgrove/hazel,hazelgrove/hazel