determine seat position names the same way as the range calcualtor does on the backend:
- all players (except dealer) who are sitting out do not get assigned a seat position
- player in dealer seat is always assigned BTN position, even if sitting out
- positions are ordered starting at the BTN: BTN, SB, BB, UTG, MP, MP+1,MP+2,MP+3,CO
- if there are two players, the seats are ordered BTN, BB (SB is considered dealer in heads-up poker)