SAN FRANCISCO — On a night when LaMonte Wade Jr. launched the Giants’ 100th Splash Hit into McCovey Cove, it was Gunnar Henderson who had the biggest swing of the game. Henderson didn’t quite find the water, but his solo home run in the seventh inning off San Francisco ace Logan Webb broke a tie and sent the Orioles to a 3-2 win Friday night at Oracle Park. “Best swing of the year,” Baltimore manager Brandon Hyde said. “An enormous hit for us against a tough starter. I know he felt great after that swing.” Henderson agreed, calling it the…