Minor silent hotfix

Minor adjustment to tire falloff rates (slightly less when hot)
Minor driveline tweaks
Adjusted brake heating, cooling & wear rate for Sigma P1
Fixed gearbox type for G40 Cup, reduced brake torque, reduced default coast bias for both models
Reduced Puma P052 FFB max force
Adjusted skiptoend to avoid AI getting faster simulates times in karts
Reduced engine idle RPM for Procar, Group A