“Jackie,” starring Natalie Portman as First Lady Jacqueline Kennedy, expands in wider release this week. The focus of the film is Mrs. Kennedy’s efforts to shape her husband’s legacy following his assassination in 1963. But it also gives us a glimpse of her famous televised tour of the White House, the first time most Americans got a chance to see the interior. Her taste and expertise in art and antiques brought an unprecedented commitment to history and design that continues today.