PASADENA, Calif. — For Idina Menzel and Nia Long, director Garry Marshall’s 1988 melodrama “Beaches,” starring Bette Midler and Barbara Hershey, is a four-hankie treat. So why do a remake? “Why not?” replied Long (“The Best Man Holiday”), pointing to the story’s timeless elements. “It really is a film about friendship and girl power and
