fix(ui): sort mappings (#3296)

* fix(ui): update sort mapping for title in mediafile repository

* fix(ui): create sort mapping for username in share repository

* fix(ui): create sort mapping for owner_name in playlist repository

* fix(ui): create sort mapping for username in player repository

* fix(ui): remove sort mapping for track number in mediafile repository

* chore: add todo to change user_name

persistence/player_repository.go

@@ -21,6 +21,9 @@ func NewPlayerRepository(ctx context.Context, db dbx.Builder) model.PlayerReposi
 	r.registerModel(&model.Player{}, map[string]filterFunc{
 		"name": containsFilter("player.name"),
 	})
+	r.sortMappings = map[string]string{
+		"user_name": "username", //TODO rename all user_name and userName to username
+	}
 	return r
 }