The family of Dina Merrill Hartley confirmed Tuesday morning that the actress and philanthropist, an icon of taste and sophistication in both worlds, died at home Monday in East Hampton, NY, surrounded by her family. The cause was Lewy Body dementia, the family said. She was 93. Merrill’s remarkable career – it could aptly be described as exquisitely curated – spanned more than half a century and included memorable roles in films from the serious (Daniel Mann’s 1960 BUtter…