A state appeals court on Wednesday upheld the Cook County Sheriff’s Merit Board’s decision to fire a sheriff’s deputy even though a prior appellate court found the board was illegally constituted at the time.In May 2017, a 1st District Appellate Court panel reversed the dismissal of a sheriff’s deputy after finding that a member of the merit board, John R. Rosales, was still hearing and deciding cases even though his term on the board had expired.Rosales was on the board when it considered the case of deputy Miguel Lopez …