Discussion: File imports/notifications.

Right now, the frontend notifies the user when any *Added websocket messages are received. The *Added/*Removed messages are sent whenever a mod/playlist/song is added/removed within the BMBF backend. This applies to all changes in the mods, songs and playlist collections, which importantly, includes:

• Automatic mod loading due to dependency installation. This means that when installing a mod with several dependencies, lots of "Mod Added" notifications are received which can overwhelm the user.
• Adding/removing songs from the playlist folders/song folder - BMBF 2 handles this process automatically, so that the songs within BMBF's cache always reflect those on disk - part of the philosophy of BMBF 2 is that it is never a source of truth. Arguably, this means that changes in playlists/songs not caused by BMBF shouldn't notify within the UI, however this is obviously debatable.

The alternative option (which Unicorn 12 would prefer but again, needs discussion) is that the *Added/*Removed messages would be used only to update the frontend's mods/playlists/songs collection, and would not be used to provide notifications. Notifications for the files imported by a user would still be provided via the FileImportResult returned by the file import endpoint.