Continued work on:
 - Datavalidation
 - Cleanup files
 - button dis-/enabling depending on selected values
 - style altering

Started:
 - Band picture (can't get it to work, left for now)
 - Lineup (drag n drop works, cleaning up)

Planned:
 - Lineup edit functionality (being able to save)
 - Lineup add times
 - Band, edit picture working