fix(iOS): CommandBar back button title

src/Uno.UI/Controls/CommandBarHelper.iOS.cs

@@ -33,7 +33,11 @@ public static void PageCreated(UIViewController pageController)
 				// For example the Uno.UI.Toolkit.CommandBarExtensions.BackButtonTitle attached property is often set globally to "" through
 				// a default CommandBar style in order to remove the back button text throughout an entire application.
 				// In order to leverage this information, we create a new CommandBar instance that only exists to "render" the NavigationItem.
-				topCommandBar = new CommandBar();
+				// Since Uno 3.0 objects which are not part of the Visualtree does not get the Global Styles applied. Hence the fact we are manually applying it here.
+				topCommandBar = new CommandBar
+				{
+					Style = Application.Current.Resources[typeof(CommandBar)] as Style
+				};
 			}
 
 			// Hook CommandBar to NavigationItem