By Ron Fassler Angela Lansbury as Rose in "Gypsy" (1974).In yesterday's column, I chronicled the late Angela Lansbury's first twenty years as a film, television and stage actress (you can read it here). It brought her to the triumph of playing Mame on Broadway in 1966, for which she would forever be branded a musical comedy star of the first rank, a role she never relinquished. Even though she was thirty-nine, …