In 'The Devil Wears Prada 2,' it's no longer chic to have a terrifying boss Meryl Streep as Miranda Priestly in "The Devil Wears Prada 2." Macall Polay/20th Century Studios "The Devil Wears Prada 2" explores changes in workplace culture since the original 2006 film. Meryl Streep's Miranda Priestly is vicious and undeniably glamorous, but those qualities now make her seem out of touch. Warning: Spoilers ahead for "The Devil Wears Prada 2." For the last two decades, the name Miranda Priestly has brought to mind a set of iconic images: a frosty white bob, a withering stare to rival Medusa's, and, of course, a pile of designer coats and purses brusquely dumped atop her assistant's desk. Back in 2006, " The Devil Wears Prada " used those images to introduce Meryl Streep's Miranda as a paragon of couture, competence, and a kind of hierarchical viciousness that would feel more appropriate in a medieval throne room than a boardroom.…