When shoppers stop at the Sparkle Market stores in northern Trumbull County, they will notice new signage after store ownership joined the Golden Dawn supermarket chain. The sign unveiling took place Thursday at both locations —169 S. High St., Cortland, and 5634 Mahoning Ave., Champion. Co-owners Chris Klingemier and Michael Rice said the stores now operate under the Golden Dawn nameplate. Rice said the change will allow the stores to obtain be…