[Feature Request] Automatically register mimetypes

[realSZ27]

Right now, if you install a program like Musescore Studio, its .mscz files won't be automatically associated with the app. It would be nice if that type was registered so that the app could be set as default. I don't know much about the topic, but I do know that these are stored in /usr/share/mime/packages in Musescore's case.

This seems like kind of a basic feature--a ton of apps use it. Maybe I'm missing something?

[mijorus]

Apps should declare their supported file types in the desktop file

[realSZ27]

Yes, but if the app specifies the type application/x-musescore, the system still needs to know that this type corresponds to the .mscz extension. Usually stored in an xml file at the aforementioned path.