Important:
- flags
- baloons
- polygon/generic lines
- jib
- pole and bowsprit
- spin

Normal:
- toggle number display
- select colour for marks
- clean selection before output
- translate boat types in popup
- more boat shapes
- one line for config options and their toggle
- open in new tab

Wishlist:
- gpx import
- backtrack edit
- track line to mouse position
- insert between boats
