No longer execute BDL continuations synchronously

osu.Framework/Graphics/Containers/CompositeDrawable.cs

@@ -205,7 +205,7 @@ protected internal Task LoadComponentsAsync<TLoadable>(IEnumerable<TLoadable> co
                         linkedSource.Dispose();
                     }
                 });
-            }, TaskContinuationOptions.ExecuteSynchronously);
+            }, CancellationToken.None); // Special cancellation handling during the continuation.
         }
 
         /// <summary>