Tribeca Shortlist, an on-demand subscription service featuring handpicked movies from popular actors, directors and insiders, is relocating to 255 West 36th Street between Seventh and Eighth Avenues, Commercial Observer has learned. The nearly one-year-old company, which charges subscribers $4.99 per month and is a joint venture between Lionsgate and Tribeca Enterprises, will be in 6,250 square feet on part of the third floor in the 15-story, 125,000-square-foot structure, a