Improvements:
- Guitar tab view of tracks implemented. The finger positions are calculated by a smart algorithm. It shows the final, rendered notes, so it is not editable.
- Bass guitar and 7-8-string guitar tunings added
- Capo setting in the guitar setup
- Mute/unmute all MIDI CC's button added under the track MIDI CC's tab
- Improved guitar chord error handling when user constraints are not met, or when the polyphony is too big for a guitar chord
- Tonnetz uses the flats/sharp usage set in the settings


