The two-time Oscar winner had a very simple explanation as to why it took her time to warm to Williams' sense of humor. Robin Williams may have been a comedy legend without parallel, but one of his most famous co-stars now admits it took her some time to warm to his sense of humor. Appearing on “ The Late Show with Stephen Colbert ” Wednesday, Sally Field reflected on her experience working with Williams on 1993’s “ Mrs. Doubtfire .” Williams, she recalled, spent much of his time trying to get