PORTLAND, Ore. -- Ann Sacks, the Portland-based design house, has released its Ann Sacks Curated Bath Collection, a design-driven experience that showcase select Ann Sacks, Robern, Kohler Lighting and Kallista products.   Many of the designs are exclusive to the Ann Sacks Curated Bath Collection, including new Robern vanities and linen cabinets and the Kohler Lighting collections. The collection is presented in seven fully appointed, traditional and contemporary vignettes.