By Denny Dyroff, Entertainment Editor, The Times A painting by Barbara Tlush, as part of the Chadds Ford Historical Society Arts Show. While the major focus for events this weekend is on outdoor activities, there is also a focus on art-related events. The Chadds Ford Historical Society’s “Spring Art Show at Thornbury Farm” is scheduled for May 15 at Thornbury Farm (1256 Thornbury Road, West Chester,...