Jane Byrne was not mighty, like her mentor, Richard J. Daley. She was not beloved, like her successor, Harold Washington. Nor was she long-serving, like her bitter rival, Richard M. Daley. But she was mayor, Chicago’s first and only female mayor — making Chicago the largest city in the United States to elect a female chief executive — serving a single, tempestuous term, ushering the city into the 1980s, leaving her own colorful legacy during a time of political change, social upheaval and financial crisis. Byrne, 81, died Friday in hospice care. She had been in poor health in recent...