[Standings] Delta should be relative to the class leader

[tariknz]

Standings in multi-class races show the delta to the overall race leader rather than the class leader. That's because it purely relies on CarIdxF2Time telemetry which just uses the race leader as the delta.

You should already have the class positions then subtract the delta from class leader to overall leader.

[TheMiggi]

There are two different deltas. One is the gap, which is the delta to the leader, and the other one is the intervall, which is the delta between the cars on track.

[tariknz]

Yep for sure - there should be two different values and have the ability to turn one, the other, or both.