Important:

Normal:
- calculate speed
- calculate CPA
- toggle number display
- more boat shapes
- open in new tab
- more flags
- fix shortcut clashes
- save default mark color
- spin trim


Wishlist:
- gpx import
- backtrack edit
- insert between boats
- starting a boat at a later number
- timing for the start boat
- animate spin hoist and drop
- create track in a series different from scenario
