Easy fix for F1 meta cars issue in P-class

Currently P-class multiplayer is pretty much unplayable because F1 cars are allowed there. These would fix the issue once and for all:

  1. Car performance points can’t be lowered below the starting point of that car (meaning, adding ballast to Ferrari F1 would not drop it from X to P)
  2. Formulas will have their own sub-category and will have own multiplayer lobbies…