ATLANTA — A dramatic drop in automatic voter registrations in Georgia may be caused by a government website that required potential voters to click a button before they could sign up. That’s not how automatic voter registration is supposed to work. The intent of the program is to register voters at driver’s license offices by default, with an option not to register. The change to automatic registration could explain a sharp decline in the rate of Georgians who opted to register through the Department of Driver Services, from 79% in 2020 to 39% last year, according to government records obtaine…