PREIT announces the grand opening of Saks Fifth Avenue OFF 5TH at Springfield Town Center in Springfield, VA   PHILADELPHIA, 2016-Sep-16 — /EPR Retail News/ — PREIT (NYSE: PEI) today (Sept. 15, 2016) announced the grand opening of Saks Fifth Avenue OFF 5TH at Springfield Town Center in Springfield, VA. The luxury-value retailer occupies 30,000 square feet…