Add global logging of WorkingBeatmap changes

osu.Game/OsuGame.cs

@@ -554,6 +554,7 @@ namespace osu.Game
         {
             beatmap.OldValue?.CancelAsyncLoad();
             beatmap.NewValue?.BeginAsyncLoad();
+            Logger.Log($"Game-wide working beatmap updated to {beatmap.NewValue}");
         }
 
         private void modsChanged(ValueChangedEvent<IReadOnlyList<Mod>> mods)

osu.Game/Screens/Select/SongSelect.cs

@@ -410,7 +410,7 @@ namespace osu.Game.Screens.Select
         {
             if (e.NewValue is DummyWorkingBeatmap || !this.IsCurrentScreen()) return;
 
-            Logger.Log($"working beatmap updated to {e.NewValue}");
+            Logger.Log($"Song select working beatmap updated to {e.NewValue}");
 
             if (!Carousel.SelectBeatmap(e.NewValue.BeatmapInfo, false))
             {