Robert Quinn’s absence from Chicago Bears mandatory minicamp six weeks ago fueled speculation that the veteran defensive end wanted to be traded as the team undergoes a renovation. But after practicing on the first day of training camp Wednesday at Halas Hall, Quinn indicated he is on board with the Bears for as long as they keep him around. Quinn said he skipped minicamp — and all of organized team activities before that — because he was taking care of his body and trying to get himself right mentally. Entering his 12th season and coming off one of the best years of his career with a Bears re…
