Inside Wakefield-Scearce Gallery, antiques fill every display case but it's not the spoons or silver saucers that put this small-town museum on the map. It's the mint julep cups.The gallery's owner, Matt Burnett, traces the origin of the iconic vessel back to his grandfather, Mark J. Scearce."The idea for our julep cups that you know today started with my grandfather. He was a jeweler across the street here from us. This was around 1947," Burnet…