[Catalyst] Adding and Removing ContextMenus currently does not work - fix (#30307)

* Disconnect context flyout handler

* Update MenuFlyoutHandler.iOS.cs

Author: kubaflo

src/Core/src/Handlers/MenuFlyoutHandler/MenuFlyoutHandler.iOS.cs

@@ -17,30 +17,18 @@ protected override UIMenu CreatePlatformElement()
 
 		public void Add(IMenuElement view)
 		{
-			Rebuild();
 		}
 
 		public void Remove(IMenuElement view)
 		{
-			Rebuild();
 		}
 
 		public void Clear()
 		{
-			Rebuild();
 		}
 
 		public void Insert(int index, IMenuElement view)
 		{
-			Rebuild();
-		}
-
-		internal static void Rebuild()
-		{
-			// TODO: Need to figure out how to rebuild the menu items for the entire context menu. On iOS/MacCat you
-			// can't add/remove individual menu items. You can call UIMenu.GetMenuByReplacingChildren(newChildren) to
-			// rebuild a specific menu, but that needs to be done at the "top" (the menu itself, not individual sub-items).
-			// https://github.com/dotnet/maui/issues/9359
 		}
 	}
 }

src/Core/src/Platform/iOS/MauiUIContextMenuInteraction.cs

@@ -36,6 +36,7 @@ static IUIContextMenuInteractionDelegate CreateDelegate(out IUIContextMenuIntera
 			if (contextFlyout == null || mauiContext == null)
 				return null;
 
+			contextFlyout.Handler?.DisconnectHandler();
 			var contextFlyoutHandler = contextFlyout.ToHandler(mauiContext);
 			var contextFlyoutPlatformView = contextFlyoutHandler.PlatformView;