Boats with multiple GPS receivers are duplicated

[schrockwell]

The boat Static has two Signals that provide position data, and we're showing both of them. This behavior is currently buggy because we assumed each boat only has 1 GPS sensor. We need to decide how to handle this:

• Allow multiple GPS sensors, and give the user full control?
• Only select and display one of the GPS sensors?

[schrockwell]

Per discussion with @CaptChrisD, this is a very common situation. We should have a way to select a primary source of GPS data for a given boat.

[schrockwell]

Waiting on #32 to build out the UI for selecting it. This ticket should be about using the selected source correctly on the map display.

[bcardarella]

And we're seeing some differences on the drawing:

https://nautic-net-web-dev.fly.dev/?boats[]=0fe016d2-5d1e-437a-9993-bf4113349095&date=2023-07-30&from=11%3A47%3A46&playback=15%3A56%3A53&to=17%3A12%3A44

[bcardarella]

[bcardarella]

one of the two position sensors is giving very low resolution data, It looks like it is getting positions every few minutes, we can simply probably set the default position sensor for a given vessel

[bcardarella]

I suspect this will require a boat page so owners can do this