gitadora: various fixes for wailing (#513)

## Link to GitHub Issue, if one exists
Fixes #512

## Description of change
Fix digital wailing not being recognized consistently.

Also address the fact that wailing was completely broken when lefty mode
was on. This requires a new option that the user needs to check off in
the configurator since we can't magically guess if the user is holding
the guitar in lefty mode.

- [x] fix downward wail
- [x] digital lefty mode
- [x] implement all of this for arena model i/o
- [x] test dx cab 2p
- [x] lefty toggle in overlay
- [x] fix analog not working for 2p guitar
- [ ] analog lefty mode?

## Testing
Checked GW and GW Delta

src/spice2x/rawinput/rawinput.cpp

@@ -1986,7 +1986,7 @@ void CALLBACK rawinput::RawInputManager::input_midi_proc(HMIDIIN hMidiIn, UINT w
                                     device.midiInfo->v2_last_off_time[midi_index] = get_performance_milliseconds();
                                     device.updated = true;
                                 }
-                                // for v2_drum, NOTE ON is ignored
+                                // for v2_drum, NOTE OFF is ignored
                             }
                         }