BARCELONA – Yuki Tsunoda used to be known for his four-letter outbursts on the team radio — this season it’s for his controlled mastery of four wheels.Where the likeable Japanese star would once rant and rave at perceived injustices out on track, nowadays he is calmness personified. Almost.This new self control is paying off handsomely with his points tally for 2024 already at 19, two more than the whole of 2023, with 15 races still to go.Chatting cheerily under a large umbrella at his RB team garage ahead of this weekend’s Spanish Grand Prix Tsunoda’s sunny outlook lit up the damp…