When Richard T. Ryan invited three of his nieces to watch him in court about 20 years ago, they finally saw what they had long assumed. “He was friendly to everybody,” said Mary Kennedy, who was about 20 at the time. “He took the time to chat with the lady who checked people’s IDs. He knew all of the people who worked at the Daley Center.” Watching him in court confirmed something else, too. “He had a great courtroom manner but, to be honest, it wasn’t any different than …