Unhelpful error message when wallpaper matching search query not found

[tasercake]

This should be reproducible by entering a search query for which a matching wallpaper can't be found withing the given search space.

Where it should say that a matching image could not be found, the error message reads: The remote server returned an error: (503) Server Unavailable

Perhaps this could be fixed to save users some troubleshooting?

[Rawns]

THanks for the info, I'll get this address for the next release. :)