These images are newly stored inside the resources/profiles/VENDOR_NAME/,
they should be named by the printer_model identifier suffixed with
"_thumbnail.png"
All the existing printer thumbnails were moved and renamed,
thumbnails for the 3rd party printers were added, marked as Beta.
Removed compatible_printers_condition = printer_family=="BIBO2"
printer_family variable is not supported, though it is a good idea.
Fortunately it was not needed for the BIBO2 printer as of now.