GNOME 47 Support

The extension does not currently support GNOME 47 or 48. A simple change to the metadata.json file to add support for those GNOME versions fixes the problem. The extension seems to work with these versions of GNOME except if you want to manually choose the wallpaper through settings. In this situation, you cannot "Select" a wallpaper for any of your desktops because clicking on the "Select" button does not save the setting. This support for the GNOME/Nautilus chooser needs to be added.

I haven't looked at the port yet, but thanks for doing it! It has been on my todo list for months.