Sure, there probably aren’t too many office pools going around wagering on whether Scott Bradley will take Tony Cisek in the set design category. But lack of watercooler chatter aside, tonight is an important night for the D.C. theater community. This evening, Warner Theatre will be bustling with our local onstage and backstage heroes, dressed to the nines, as they celebrate the Helen Hayes Awards, which recognize the year’s finest contributions to professional theatre in…