Control: tags -1 - fixed-upstream + wontfix Control: severity -1 wishlist thanks
The upstream bug thread indicates the dragonplayer desktop entry has exactly the list of MIME types that it's supposed to. Leaving this bug open (with fixed metadata) in case they change their minds someday.
In case bts-link adds fixed-upstream to tags again, note that this is incorrect and it was closed as "WORKSFORME" by the developer.