chore: Tunneling events, fixes

src/Uno.UI.RuntimeTests/IntegrationTests/dxaml/controls/combobox/ComboBoxIntegrationTests.cs

@@ -1086,7 +1086,7 @@ await RunOnUIThread(() =>
 	}
 
 	[TestMethod]
-	[Ignore("The first verify fails as ComboBox pre-selects index 0 due to SelectionChangedTrigger.Always #17988")]
+	[Ignore("The first verify fails as ComboBox pre-selects index 0 due to SelectionChangedTrigger.Always. This is likely a new behavior! #17988")]
 	public async Task ValidateKeyboardInteraction()
 	{
 		var comboBox = await SetupBasicComboBoxTest();

src/Uno.UI/UI/Xaml/Controls/Primitives/Selector.partial.h.mux.cs

@@ -19,7 +19,7 @@ partial class Selector
 	// m_focusedIndex to make it easier to track when this field is read & written.
 	private protected int GetFocusedIndex() => m_focusedIndex;
 
-	void SetFocusedIndex(int focusedIndex)
+	internal void SetFocusedIndex(int focusedIndex)
 	{
 		if (m_focusedIndex != focusedIndex)
 		{

src/Uno.UI/UI/Xaml/UIElement.RoutedEvents.cs

@@ -590,6 +590,22 @@ internal bool SafeRaiseEvent(RoutedEvent routedEvent, RoutedEventArgs args, Bubb
 			}
 		}
 
+		internal bool SafeRaiseTunnelingEvent(RoutedEvent routedEvent, RoutedEventArgs args)
+		{
+			try
+			{
+				RaiseTunnelingEvent(routedEvent, args);
+				return true;
+			}
+			catch (Exception e)
+			{
+				if (this.Log().IsEnabled(LogLevel.Error))
+				{
+					this.Log().Error($"Failed to raise '{routedEvent.Name}': {e}");
+				}
+				return false;
+			}
+		}
 
 		/// <summary>
 		/// Raise a routed event