Update Metadata When Adding/Editing Text In Score

Current Behavior:
Metadata in Score Properties is not dynamically linked to corresponding fields in .mscz file (ex: Title, Composer, Arranger, etc.).

Desired Behavior:
Metadata in Score Properties is dynamically linked to corresponding fields in .mscz file (ex: Title, Composer, Arranger, etc.).

When text is entered into or edited in a field that corresponds to metadata entry, metadata is dynamically written or modified.