After the drumline and dancers filed off a scaled-down basketball court, but before Kawhi Leonard and Paul George closed the groundbreaking ceremony of the Clippers’ long-planned Inglewood arena by dipping chrome-tipped shovels into dirt, Clippers owner Steve Ballmer told his audience about his favorite elements of the billion-dollar Intuit Dome. “We don’t play in anybody’s shadow.” Clippers owner Steve Ballmer …