Fix #13474 by partially reverting #12883 (#13663)

* Failing unit test for #13474

* Fix for #13474 by reverting changes to ListBoxItem from #12883

* Version 2 of fix, only marks event handled for Mouse input.

* Version 3.  Re-raise the event, but backup the source before doing so and restore it after.  Closest in functionality to original, but preserves "correct" event source in order to allow Tapped events.

---------

Co-authored-by: Jumar Macato <16554748+jmacato@users.noreply.github.com>

src/Avalonia.Controls/ListBoxItem.cs

@@ -104,7 +104,11 @@ namespace Avalonia.Controls
                         // As we only update selection from touch/pen on pointer release, we need to raise
                         // the pointer event on the owner to trigger a commit.
                         if (e.Pointer.Type != PointerType.Mouse)
+                        {
+                            var sourceBackup = e.Source;
                             owner.RaiseEvent(e);
+                            e.Source = sourceBackup;
+                        }
 
                         e.Handled = true;
                     }

tests/Avalonia.Controls.UnitTests/ListBoxTests.cs

@@ -1289,6 +1289,55 @@ namespace Avalonia.Controls.UnitTests
             }
         }
 
+        [Fact]
+        public void ListBoxItem_Should_Not_Block_Tapped_Events()
+        {
+
+            // #13474
+            using (UnitTestApplication.Start(TestServices.StyledWindow))
+            {
+
+                Pointer _pointer = new Pointer(Pointer.GetNextFreeId(), PointerType.Touch, true);
+                ulong nextStamp = 1;
+
+                var items = Enumerable.Range(0, 10).Select(x => $"Item {x}").ToArray();
+                var target = new ListBox
+                {
+                    Template = ListBoxTemplate(),
+                    ItemsSource = items,
+                    SelectionMode = SelectionMode.Toggle,
+                    ItemTemplate = new FuncDataTemplate<string>((x, _) => new TextBlock { Height = 10 })
+                };
+
+                Prepare(target);
+
+                var lbItems = target.GetLogicalChildren().OfType<ListBoxItem>().ToArray();
+
+                var item = lbItems[0];
+
+                int tappedCount = 0;
+                target.Tapped += (s, e) =>
+                {
+                    tappedCount++;
+                };
+
+                _mouse.Click(item);
+                Assert.Equal(1, tappedCount);
+
+                // Raise PointerPressed and PointerReleased events with the Left Button pressed.  TouchTestHelper 
+                // assumes no button pressed, which prevents it from generating Tapped events, or I would use that.
+
+                item.RaiseEvent(new PointerPressedEventArgs(item, _pointer, (Visual)item, default, nextStamp++,
+                    new PointerPointProperties(RawInputModifiers.None, PointerUpdateKind.LeftButtonPressed), KeyModifiers.None));
+
+
+                item.RaiseEvent(new PointerReleasedEventArgs(item, _pointer, (Visual)item, default, nextStamp++,
+                    PointerPointProperties.None, KeyModifiers.None, MouseButton.Left));
+
+                Assert.Equal(2, tappedCount);
+            }
+        }
+
         private static void RaiseKeyEvent(Control target, Key key, KeyModifiers inputModifiers = 0)
         {
             target.RaiseEvent(new KeyEventArgs