When we first got to see her on “Saved By The Bell,” she was Tiffani-Amber Thiessen — and to many, she’ll always be Tiffani-Amber.  Yet the actress, who stars in the new USA cable series “White Collar,” dropped the hypenated name several years ago, and we asked her why. (CLICK ON THE MEDIA BAR BELOW TO HEAR TIFFFANI THIESSEN)