Allow user to drag an outline image directly from a browser window to canvas, instead of having to do a "Save as..." to a local file in the browser first.
Technically: Accept a URL source in the canvas drop target handler, and use QHttp to download it implicitly.
Forget QHttp, use same code as for update check. Design non-trivial if we combine with background download of new versions. Need design for cache: where to put, how to test for stale, how to clean on uninstall, size limits, etc.