Grover’s Corners, the fictional New Hampshire town where “Our Town” was set more than a century ago, may not be all that different from Bar Harbor, or other Maine towns — even today in the 21st century, according to Gina Sabatini. Sabatini is continuing the tradition of professional-quality student theater productions at College of the Atlantic, directing the classic Thornton Wilder play, to be performed Feb. 24 …