This burger chain is looking to beef up its sales.  Wendy’s is testing better ingredients as part of a major multiyear turnaround plan after seven straight quarters of dropping sales. The burger chain says the upgrades include thicker, crispier bacon and a richer, creamier Frosty. Wendy’s plans to make their cut of bacon “substantially thicker” and more textured to improve crunch and flavor intensity on items like the Baconator. The Baconator is an iconic signature…