On paper, New York State Comptroller is a sleepy job. No press secretary emerges from the office to spin the Sunday shows. No Twitter feuds, no viral moments. A recent poll found that 65% of New York Democrats have never heard of the man who has held the position for two decades. What Thomas DiNapoli actually controls is another matter entirely. As sole trustee of the New York State Common Retirement Fund—the third-largest pension fund in the Un…