Menubar (#4839)

* Menu Bar

* - wire up all the handlers and classes

* - remove extra type

* - rework menu elements

* - fixup WinUI MenuBar placement

* - add interfaces

* - Cleanup interfaces

* - remove text style APIs

* - wire up icon

* - fix interface

* - stream line inheritance a bit more

* - fix

* - fixup some builder

* - fixup menu selector calls

* - fixed sub menu items

* - demo code

* - fix rebase

* - centralize menu code

* - start the fun

* - move menubaritems to page

* - MenuBar Page

* - add additional clicks

* - fixup types

* - Catalyst images/clicks

* - wire images

* - Add Tests

* - remove DesktopSupportTestPage

* - add check for selector when adding menu items

src/Compatibility/ControlGallery/src/Issues.Shared/Compatibility.ControlGallery.Issues.Shared.projitems

@@ -1294,7 +1294,6 @@
     <Compile Include="$(MSBuildThisFileDirectory)Bugzilla52700.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Bugzilla39407.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)ButtonFastRendererTest.cs" />
-    <Compile Include="$(MSBuildThisFileDirectory)DesktopSupportTestPage.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Bugzilla58779.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Bugzilla51825.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Bugzilla31688.cs" />

src/Compatibility/Core/src/Handlers/ListView/Windows/CellControl.cs

@@ -462,8 +462,8 @@ void SetupMenuItems(MenuFlyout flyout)
 		{
 			foreach (MenuItem item in Cell.ContextActions)
 			{
-				var flyoutItem = new MenuFlyoutItem();
-				flyoutItem.SetBinding(MenuFlyoutItem.TextProperty, "Text");
+				var flyoutItem = new UI.Xaml.Controls.MenuFlyoutItem();
+				flyoutItem.SetBinding(UI.Xaml.Controls.MenuFlyoutItem.TextProperty, "Text");
 				//WINUI FIX
 				//flyoutItem.Command = new MenuItemCommand(item);
 				flyoutItem.DataContext = item;

src/Compatibility/Core/src/Windows/CellControl.cs

@@ -466,8 +466,8 @@ void SetupMenuItems(MenuFlyout flyout)
 		{
 			foreach (MenuItem item in Cell.ContextActions)
 			{
-				var flyoutItem = new MenuFlyoutItem();
-				flyoutItem.SetBinding(MenuFlyoutItem.TextProperty, "Text");
+				var flyoutItem = new Microsoft.UI.Xaml.Controls.MenuFlyoutItem();
+				flyoutItem.SetBinding(UI.Xaml.Controls.MenuFlyoutItem.TextProperty, "Text");
 				//WINUI FIX
 				//flyoutItem.Command = new MenuItemCommand(item);
 				flyoutItem.DataContext = item;

src/Controls/samples/Controls.Sample/Pages/Core/MenuBarPage.cs

@@ -0,0 +1,52 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Microsoft.Maui.Controls;
+using Microsoft.Maui.Graphics;
+
+namespace Maui.Controls.Sample.Pages
+{
+	public partial class MenuBarPage
+	{
+		public MenuBarPage()
+		{
+			InitializeComponent();
+		}
+
+		void ItemClicked(object sender, EventArgs e)
+		{
+			if (sender is MenuFlyoutItem mfi)
+			{
+				menuLabel.Text = $"You clicked on Menu Item: { mfi.Text}";
+			}
+		}
+
+		void ToggleMenuBarItem(object sender, EventArgs e)
+		{
+			MenuBarItem barItem =
+				MenuBarItems.FirstOrDefault(x => x.Text == "Added Menu");
+
+			if(barItem == null)
+			{
+				barItem = new MenuBarItem()
+				{
+					Text = "Added Menu"
+				};
+
+				barItem.Add(new MenuFlyoutItem()
+				{
+					Text = "Added Flyout Item",
+					Command = new Command(() => ItemClicked(barItem.First(), EventArgs.Empty))
+				});
+
+				MenuBarItems.Add(barItem);
+			}
+			else
+			{
+				MenuBarItems.Remove(barItem);
+			}
+		}
+	}
+}