Implement an image URL field in desktop cards so

[jussih]

Currently the card thumbnail images are downloaded from the URL provided in MPASS service listing API and saved on disk. To avoid redownloading the same files each time the API is checked the system currently only downloads the image if there is no pre-existing thumbnail for the Service. This means the thumbnail won't ever update in Demo Velmu if the image contents are changed in the origin.

If we use just an image url as the card thumbnail, the actual file will be served from the origin instead of downloaded to Demo Velmu.