QML Image should have a fillMode that prevents it from being scaled.

Currently it is not possible to have an Image element and tell it to "never scale the image, but render it as-is taking into account your current alignment." There should be a fillMode property that tells the Image element to paint its contents without any scaling. At the moment this behavior can be achieved by setting the contentSize property of the Image element to the exact dimensions of the image, but this approach is not feasible when the dimensions of the image are not known, or are too arduous to query.