After a holiday season marked by sales dips and losses in market share, GameStop Corp. has announced plans to close 2 to 3 percent of its physical stores. The Grapevine, Texas-based retailer (NYSE: GME) said in its fourth quarter and full-year 2016 earnings that it’s shuttering at least 150 locations as it shifts its focus away from video game hardware and software and toward categories like technology and collectibles. It did not say when the closures will happen or how many employees will be…