James H. Whalen thinks a lot about how his law firm can evolve.The 40-year-old became a co-managing partner of Lipe Lyons Murphy Nahrstadt & Pontikis Ltd. last year. His new post has allowed Whalen to come up with new ideas to attract and keep the next generation of talent.In a written questionnaire, Whalen — a 2004 graduate of DePaul University College of Law — discussed the changes the firm has implemented, including new policies on dress codes and working from home.Law Bulletin:Within the last year, you …