Merge pull request #1195 from AvaloniaUI/fixes/treeview-timer-exception-zero-interval

Fix using dispatcher timer with 0 time interval causing exception.

src/Avalonia.Controls/TreeView.cs

@@ -253,9 +253,7 @@ namespace Avalonia.Controls
 
                         if (AutoScrollToSelectedItem)
                         {
-                            DispatcherTimer.RunOnce(
-                                container.ContainerControl.BringIntoView,
-                                TimeSpan.Zero);
+                            Dispatcher.UIThread.InvokeAsync(container.ContainerControl.BringIntoView);
                         }
 
                         break;