At the opening of Florine Stettheimer’s Museum of Modern Art retrospective in 1946, her sister, Ettie Stettheimer, reportedly said, “I feel that this is the beginning of something.” For a while, i<a href="/art-news/artists/to-all-tomorrows-parties-break-out-the-bubbly-florine-stettheimers-back-8170/" target="_blank" rel="noopener noreferrer nofollow"…