Problem

Browsers don't support XCF and DjVu files so users can't see the images in Openverse outside of thumbnails. We want to improve this, so the thumbnail at full size must be displayed instead of the original file. @sarayourfriend suggested using the thumbnail URL passing full_size=True and compressed=False.

Take this XCF for example: https://openverse.org/image/054b17fa-fdd7-42bb-a1a4-8989fbe4a074
This DjVu for example: https://openverse.org/image/e141c4e0-239b-4c67-80d0-d5cce5d8d08c

Additional context

Arose from #4717.