Structured-data introduces a new concept to users, depicts. It would be good if we could add a tooltip to the "depicts" upload stage in the structured-data branch, to educate them on what it means (similar to what we currently have for title/desc).

Instead of just one static list of wallpapers, it would be cool to make it so that anyone can define their own list of wallpapers as a subpage of their userpage if they want to. It would be a pretty simple fix – adding the settings, and then make ImageListURL a settings parameter instead. It should probably have some checks to see if the page the user enters actually exists, though.