fix: Properly resubscribe to nested prop changes (#622)

* fix: Properly resubscribe to nested prop changes

* chore: whitespace

* chore: whitespace

(cherry picked from commit 8f4a08f)

# Conflicts:
#	src/Uno.Toolkit.RuntimeTests/Tests/NavigationBarTests.cs

src/Uno.Toolkit.RuntimeTests/Tests/NavigationBarTests.cs

@@ -244,6 +244,7 @@ public RedNavBarPage()
 				};
 			}
 		}
+<<<<<<< HEAD
 
 		[TestMethod]
 		[RequiresFullWindow]
@@ -274,6 +275,8 @@ private static void AssertNavigationBar(Frame frame)
 			Assert.IsTrue(renderedNativeNavBar!.Height > 0, "Native toolbar height is not greater than 0");
 			Assert.IsTrue(renderedNativeNavBar!.Width > 0, "Native toolbar width is not greater than 0");
 		}
+=======
+>>>>>>> 8f4a08f (fix: Properly resubscribe to nested prop changes (#622))
 #endif
 
 #if __IOS__
@@ -403,11 +406,15 @@ private static void AssertNavigationBar(Frame frame)
 			Assert.AreSame(renderedNativeNavItem, presenter.NavigationController.TopViewController.NavigationItem);
 			Assert.AreSame(renderedNativeNavBar, presenter.NavigationController.NavigationBar);
 
+<<<<<<< HEAD
 			Assert.IsTrue(renderedNativeNavBar!.Bounds.Height > 0, "Native toolbar height is not greater than 0");
 			Assert.IsTrue(renderedNativeNavBar!.Bounds.Width > 0, "Native toolbar width is not greater than 0");
 		}
 #endif
 #endif
+=======
+
+>>>>>>> 8f4a08f (fix: Properly resubscribe to nested prop changes (#622))
 
 		private sealed partial class FirstPage : Page
 		{
@@ -540,13 +547,18 @@ public static class NavigationBarTestHelper
 		public static UINavigationItem? GetNativeNavItem(this NavigationBar? navBar) => navBar
 			?.TryGetRenderer<NavigationBar, NavigationBarNavigationItemRenderer>()
 			?.Native;
+<<<<<<< HEAD
 
 #elif __ANDROID__
 		public static AndroidX.AppCompat.Widget.Toolbar? GetNativeNavBar(this NavigationBar? navBar) => navBar
 			?.TryGetRenderer<NavigationBar, NavigationBarRenderer>()
 			?.Native;
 #endif
 		public static Task<NavigationBar?> NavigateAndGetNavBar<TPage>(this Frame frame) where TPage : Page
+=======
+#endif
+		public static async Task<NavigationBar?> NavigateAndGetNavBar<TPage>(this Frame frame) where TPage : Page
+>>>>>>> 8f4a08f (fix: Properly resubscribe to nested prop changes (#622))
 		{
 			return frame.NavigateAndGetNavBar(typeof(TPage));
 		}