Prevent AspectRatio menu item from being unchecked

src/LibVLCSharp.Uno/PlaybackControlsBase.cs

-using System;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using FontAwesome;
@@ -696,18 +696,29 @@ namespace LibVLCSharp.Uno
 
         private void AspectRatioMenuItemClick(AspectRatio aspectRatio)
         {
-            Manager.Get<AspectRatioManager>().AspectRatio = aspectRatio;
+            var aspectRatioManager = Manager.Get<AspectRatioManager>();
+            var currentAspectRatio = aspectRatioManager.AspectRatio;
+            aspectRatioManager.AspectRatio = aspectRatio;
+            if (currentAspectRatio == aspectRatio)
+            {
+                // To prevent the menu item from being unchecked
+                UpdateZoomMenu(aspectRatio);
+            }
         }
 
-        private void AspectRatioChanged(object sender, EventArgs e)
+        private void UpdateZoomMenu(AspectRatio aspectRatio)
         {
             if (ZoomMenu != null)
             {
-                var aspectRatio = ((AspectRatioManager)sender).AspectRatio;
                 CheckMenuItem(ZoomMenu, ZoomMenu.Items.OfType<ToggleMenuFlyoutItem>().First(i => (AspectRatio)i.CommandParameter == aspectRatio));
             }
         }
 
+        private void AspectRatioChanged(object sender, EventArgs e)
+        {
+            UpdateZoomMenu(((AspectRatioManager)sender).AspectRatio);
+        }
+
         private void Flyout_Opened(object sender, object e)
         {
             Manager.Get<AutoHideNotifier>().Enabled = false;