Photo Illustration by Luis G. Rendon/The Daily Beast/Getty ImagesEsteemed art collectors Raphael and Jane Bernstein were allegedly swindled out of millions of dollars by an opportunistic personal assistant, according to a new lawsuit.The Bernsteins, 92 and 87, respectively, are prominent patrons of the arts whose collection has been shown in the Metropolitan Museum of Art, the National Gallery of Art, and the Hood Museum at Dartmouth. A biography on the Hood Museum website describes them as “eli