George N. Leighton, a former judge who sat on the Cook County Circuit Court, Illinois Appellate Court and federal benches and whose storied legal career stretches back decades, died Wednesday at the age of 105.Leighton’s name adorns the same criminal courthouse where he was indicted for helping clients in a civil rights case.In 1951, Leighton represented a black military veteran and his family who were blocked by police from occupying an apartment they rented in Cicero, an all-white suburb at the time.Leighton …