Designer shape icons don't match visual style and don't scale well

The icons used for shapes in the palette and on the canvas are black & white, which doesn't fit in well with the overall style of the designer. They also don't scale very well if the diagram's zoom level is above 100%. Admittedly, this might not be feasible anyway if a scalable format cannot be attached to the container shape, but at least having a set of scalable and visually more appealing icons would be preferable.