The big takeaway tonight from a panel screening of The Walking Dead season 5 finale, held tonight at the Egyptian theater as part of AMC’s Emmys push: it turns out that behind the scenes, the show is just as much of a Ricktatorship as it is onscreen. Or to put it more clearly, Andrew Lincoln is far and away the most beloved – by his costars – member of the cast. Again and again, cast members went out of their way to praise Lincoln as a supportive coworker who as often as…