A seaside village once served as a tucked away treasure trove of antique stores surrounded by a mixed array of modest and colourful homes. Reporter Millie Bowles looks at how expensive luxury modern houses, trendy cafes and bars sprung up when dealers shut up shop and took their wares elsewhere. Two miles west of Folkestone, the arguably more affluent village of Sandgate has become a hot spot for bold glass-fronted properties, many built within cliffs and graced with sea views. And while some, of course, enjoy the aesthetic – no doubt the money their owners pump into the community too – others…