Fix various small sort issues

persistence/album_repository.go

@@ -26,7 +26,7 @@ func NewAlbumRepository(ctx context.Context, o orm.Ormer) model.AlbumRepository
 	r.ormer = o
 	r.tableName = "album"
 	r.sortMappings = map[string]string{
-		"artist": "compilation asc, album_artist asc, name asc",
+		"artist": "compilation asc, order_album_artist_name asc, order_album_name asc",
 		"random": "RANDOM()",
 	}
 	r.filterMappings = map[string]filterFunc{

persistence/artist_repository.go

@@ -26,6 +26,9 @@ func NewArtistRepository(ctx context.Context, o orm.Ormer) model.ArtistRepositor
 	r.ormer = o
 	r.indexGroups = utils.ParseIndexGroups(conf.Server.IndexGroups)
 	r.tableName = "artist"
+	r.sortMappings = map[string]string{
+		"name": "order_artist_name",
+	}
 	r.filterMappings = map[string]filterFunc{
 		"name": fullTextFilter,
 	}

persistence/mediafile_repository.go

@@ -23,8 +23,8 @@ func NewMediaFileRepository(ctx context.Context, o orm.Ormer) *mediaFileReposito
 	r.ormer = o
 	r.tableName = "media_file"
 	r.sortMappings = map[string]string{
-		"artist": "artist asc, album asc, disc_number asc, track_number asc",
-		"album":  "album asc, disc_number asc, track_number asc",
+		"artist": "order_artist_name asc, album asc, disc_number asc, track_number asc",
+		"album":  "order_album_name asc, disc_number asc, track_number asc",
 	}
 	r.filterMappings = map[string]filterFunc{
 		"title": fullTextFilter,