The hats tossed onto the ice Sunday in honor of William Karlsson’s three goals are not going to waste. The Golden Knights plan to build a permanent display featuring the headwear thrown by fans after hat tricks. Karlsson notched the first hat trick in Knights history Sunday, capping the 6-3 victory over Toronto when he dived for a loose puck and swatted it into an empty net. “I leaned against the bag and saw all the hats there, so it was a cool picture,” Karlsson said.