Denise Richardson took her kids to Spring Hill Mall in West Dundee, Illinois, so often that at Christmas time, the Santa Claus there recognized them by name. She remembers when department stores moved out of Elgin, then a city of 64,000 people in the exurbs of Chicago, to the mall when it opened in 1980, and it was the place to be. But the mall closed last month, the victim of trends that have ...