Improvements to Hairpin Inspector
Currently a "0" in the hairpin "velocity change" field is confusing for the user because it suggests that the hairpin does not apply any velocity change along its span. However, it seems that "0" should actually be "auto" as the hairpin defaults to an end value based on the next available dynamic indication in the score. Two suggestions:
1. The current "0" in the "velocity change" field should be replaced with an "auto" option. This will remove ambiguity.
2. There should be a "play" tickbox so that the user can turn off playback properties and render the hairpin inactive if desired.