Margot Robbie has spent the last few years establishing herself as quite the power player. The actress broke out in Martin Scorsese's The Wolf of Wall Street and has steadily climbed her way to the top ever since, but she's not just an Oscar-nominated actress -- Robbie wasted no time setting herself up behind the scenes as a producer with her banner Lucky Chap. And it was her dang idea that got Warner Bros. upcoming Birds of Prey and the Fantabulous Emancipation of One Harley Quinn started in the first place. Earlier this year, I visited the set …