Price pinning API tweaks

[ChrisSchinnerl]

Key name consistency: I’ll consider the autopilots key inconsistency. I guess it could indeed be autopilotPins but it’s a map of autopilot id -> pins. The MaxRPCPrice is an oversight, I’ll change that.
Will fix the misspelling
Qa: Yeah there’s no conversion happening so the units carry over
Qb: I don’t mind adding a default forex API, definitely if it helps with UX. I’ll add that!