A Harvey man who mistakenly filed his candidacy as a Democrat for a nonpartisan aldermanic election — then submitted a second set of petitions once he realized his error — can stay on the April ballot, a 1st District Appellate Court panel ruled last week.In its published opinion, the panel ruled the part of the state Election Code governing partisan elections doesn’t apply in nonpartisan elections.Tyrone Rogers circulated a second set of nominating petitions as a candidate for the south suburb’s 6th …