Bobbi Brown is back.Twenty-six years after selling her eponymous cosmetics company to Estee Lauder, the makeup maven has opened a retail store in Montclair called Jones Road.The 1,000 square-foot flagship store, carrying Brown’s year-old direct-to-consumer cosmetics line, Jones Road, opened Tuesday in a new office building on the corner of Walnut and Grove Streets owned by her husband, real estate…