In previous versions of Anki, I believe we could have included images in the config.markdown that shows up when a user clicks the config for a particular addon. From what I remember, this was only possible through the QRC resource system, but it seems now that doesn’t seem to show the image either. I was wondering if what the new way to display images is now?
I don’t recall this being a deliberate change. If you can build Anki from source, a git bisect might reveal when and why it broke.