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Simplify logic in PitchCompassDrawWidget::updateCompass()

Update `PitchCompassDrawWidget::updateCompass()` to use `MusicNote::pitchOffsetInKey()`

Modify `MusicNote::pitchOffsetInKey()` to take the tuning reference into account

Remove duplicate default value of `PitchCompassView` mode

Merge shared code for mode 0 and mode 1

Add `padLabel()` helper function to pad labels to equal width

Force update of compass for Mode1 correctly

Only blank compass needle -- not labels

Move compass label logic from `updateCompass()` to `setCompassScale()`

Change scale for compass modes 0 and 1 to be 0-4

Update compass modes 0 and 1 to use `closestNote()` and `temperedPitch()`

Don't use `getCorrelation() >= 0.9`

Move one-time config from `PitchCompassDrawWidget::setCompassScale()` to constructor

Remove unnecessary calls to `setSingleSteps()`