"ON THE 20th CENTURY" " A LILY BLOOMS Judy Kaye and Kevin Kline in "On the 20th Century" (1978).For part three of the saga of On the 20th Century, we begin with the Varietyreview dated February 20, 1978 which stated (rather unfairly) that "It's ominous when an audience leaves a musical whistling the scenery." This was due to the remarkable achievement of Robin Wagner's scenic design, one of the most…