DEAR MISS MANNERS: I am a longtime employee of a company that has offered additional work-from-home days to IT workers willing to exchange their spacious and private offices for a desk in a shared room when working on-site. To skip the commute for an additional two days per week, I took advantage of this offer and gave up my office. What do I say or do, if anything, in response to the inevitable feelings of resentment from employees to whom this tradeoff has not been offered? How do I best respond in a firm but polite way to comments like, “I’m not sure what your schedule is, now that you’re h…