Bruce Springsteen is still Working on a Theme. Actually, it’s more or less the same theme he’s been working on at least since Darkness on the Edge of Town in 1978, when the theme morphed from, essentially: This town is full of losers. Let’s you and me pull out of here to win! Into this: Chin up, You. And chin up, America! Yes, things are bad. Real bad. I know how bad they are. Mary’s…