Add radius to bounding box (circle)

 Currently you can only add a square or rectangle as a bounding box. Some products we have however, are not shaped like a rectangle or square, but are circular. By adding a radius to the bounding box it should be possible to make the edges rounded and even make it a circle or oval. This would add a lot of functionality to the box itself and would prevent users from making a design that does not fit on the product.