Resize thumbnail to requested size #2
Description
In the gnome thumbnailing system, the requested size for a thumbnail is passed with the %s placeholder (see /resources/appimage-thumbnailer.thumbnailer). The gnome thumbnailer should honor the argument and resize .DirIcon to the requested size.
In the kde thumbnailing system, the requested size for a thumbnail is passed with arguments witdht and height. QImage provides a method (scaled) for resizing the icon.