attempt to test changes on application menu

samples/ControlCatalog/App.xaml

@@ -20,13 +20,24 @@
 
   <NativeMenu.Menu>
     <NativeMenu>
-      <NativeMenuItem>
+      <NativeMenuItem Header="File">
         <NativeMenuItem.Menu>
           <NativeMenu>
-            <NativeMenuItem Header="About Avalonia" />
-            <NativeMenuItemSeperator />
-            <NativeMenuItem Header="Preferences" Gesture="CMD + ," />
-            <NativeMenuItemSeperator />
+            <NativeMenuItem Header="Open" Clicked="OnOpenClicked"/>
+            <NativeMenuItem Header="Recent">
+              <NativeMenuItem.Menu>
+                <NativeMenu/>
+              </NativeMenuItem.Menu>
+            </NativeMenuItem>
+            <NativeMenuItem Header="Quit Avalonia" Clicked="OnCloseClicked" Gesture="CMD+Q"/>
+          </NativeMenu>
+        </NativeMenuItem.Menu>
+      </NativeMenuItem>
+      <NativeMenuItem Header="Edit">
+        <NativeMenuItem.Menu>
+          <NativeMenu>
+            <NativeMenuItem Header="Copy"/>
+            <NativeMenuItem Header="Paste"/>
           </NativeMenu>
         </NativeMenuItem.Menu>
       </NativeMenuItem>

samples/ControlCatalog/App.xaml.cs

@@ -1,4 +1,6 @@
+using System;
 using Avalonia;
+using Avalonia.Controls;
 using Avalonia.Controls.ApplicationLifetimes;
 using Avalonia.Markup.Xaml;
 
@@ -6,11 +8,20 @@ namespace ControlCatalog
 {
     public class App : Application
     {
+        private NativeMenu _recentMenu;
+
         public override void Initialize()
         {
             AvaloniaXamlLoader.Load(this);
 
             Name = "Avalonia";
+
+            _recentMenu = ((NativeMenu.GetMenu(this).Items[0] as NativeMenuItem).Menu.Items[1] as NativeMenuItem).Menu;
+        }
+
+        public void OnOpenClicked(object sender, EventArgs args)
+        {
+            _recentMenu.Items.Insert(0, new NativeMenuItem("Item " + (_recentMenu.Items.Count + 1)));
         }
 
         public override void OnFrameworkInitializationCompleted()