Direct2D Pen Section Test: fix build. The test now runs, but is incomplete because bevel/miter have not been implemented in the platform.
Direct2D: Implement Icon. Fix Transform tests to compile and run. The result is still incomplete and does not look quite right. TransformSection uses PixelOffsetSection, whose image needs to be made per-Generator. Even better, all test images need to be per-Generator.
Image: Add helper getter properties Width and Height.