The Music Box Theatre was the place to be last night, March 23, as Mark Rosenblatt's Olivier Award-winning play Giant officially opened. It is led by two-time Tony Award winner John Lithgow as Roald Dahl and directed by two-time Tony Award winner Nicholas Hytner. A world-famous children's author under threat. A battle of wills in the wake of scandal. And one chance to make amends. Following an acclaimed West End r…