Jabin Botsford/ReutersDespite the troubles plaguing Donald Trump’s first criminal trial in New York City, the process reached a milestone Thursday afternoon when the judge filled all 12 seats of the jury that will determine his fate.But the slog is far from over, as prosecutors and defense lawyers must now screen dozens of other jurors to pick the half-dozen New Yorkers who will serve as alternates during the next month or two—and might not even make it into the deliberation room.The new additio