add setting to show albums with single track as singles

+ add the above setting to db queries file and migration

app/migrations/v1_3_0/__init__.py

@@ -296,7 +296,8 @@ class UpdateAppSettingsTable(Migration):
             remove_prod integer NOT NULL DEFAULT 1,
             clean_album_title integer NOT NULL DEFAULT 1,
             remove_remaster integer NOT NULL DEFAULT 1,
-            merge_albums integer NOT NULL DEFAULT 0
+            merge_albums integer NOT NULL DEFAULT 0,
+            show_albums_as_singles NOT NULL DEFAULT 0
         );
         """