To the women and girls in the Step Up Women’s Network, everything around Angela R. Elbert is a “silver pool of light,” and they’re the lucky ones who “feel the benefit of it.” Those are a few lyrics from KT Tunstall’s “Suddenly I See,” which has become one of the unofficial rallying songs for the nonprofit’s Chicago board. “She just has such a presence when you meet her,” said Cassandra Gaddo, Step Up Chicago’s managing director. &ldquo …