Feature request: add "Front, interior side" type to Cover art

On many CD releases, the front cover is printed on both sides.
So the users can scan them both and then upload them. They can choose “Back”, “Liner” and “Front”.
But there should be an option to mention the fact that the scan is the interior side of the front cover.

For example, on this release, the second image (gray) is the interior side of the front cover:

I generally use ‘booklet’ for that, but it is a little misleading if it’s just a single unfolded insert.


I put things like “inside”, “outside”, “gatefold inside” in the comment field.