By Mollie Quirk Prince Harry seemingly shared a late-night joke with the award winners at the Diana Legacy Award earlier this week, just mere hours after his brother Prince William left the event. Prince Harry and Prince William made a “joint” appearance at the Diana Legacy Awards earlier this week. The once-close brothers came together – albeit separately – at the Science Museum in London. The feuding siblings were not in the room together, with Prince Harry not even in the same building as he video-linked in after William gave a speech and departed the event swiftly. William took the stage t…