Fix double onloaded calls for dialogs

Author: ionite34

StabilityMatrix.Avalonia/Controls/BetterContentDialog.cs

@@ -391,10 +391,11 @@ private void OnLoaded(object? sender, RoutedEventArgs? e)
         }
 
         // Also call the vm's OnLoad
-        if (Content is Control { DataContext: ViewModelBase viewModel })
+        // (UserControlBase handles this now, so we don't need to)
+        /*if (Content is Control { DataContext: ViewModelBase viewModel })
         {
             viewModel.OnLoaded();
             Dispatcher.UIThread.InvokeAsync(viewModel.OnLoadedAsync).SafeFireAndForget();
-        }
+        }*/
     }
 }