fix(ToggleMenuFlyoutItem): added DefaultStyleKey so that the correct …

…style is used

src/SamplesApp/UITests.Shared/UITests.Shared.projitems

@@ -773,6 +773,10 @@
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>
     </Page>
+    <Page Include="$(MSBuildThisFileDirectory)Windows_UI_Xaml_Controls\Flyout\Flyout_ToggleMenu.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:Compile</Generator>
+    </Page>
     <Page Include="$(MSBuildThisFileDirectory)Windows_UI_Xaml_Controls\Flyout\Flyout_Unloaded.xaml">
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>
@@ -3833,6 +3837,9 @@
     <Compile Include="$(MSBuildThisFileDirectory)Windows_UI_Xaml_Controls\Flyout\Flyout_TemplatedParent.xaml.cs">
       <DependentUpon>Flyout_TemplatedParent.xaml</DependentUpon>
     </Compile>
+    <Compile Include="$(MSBuildThisFileDirectory)Windows_UI_Xaml_Controls\Flyout\Flyout_ToggleMenu.xaml.cs">
+      <DependentUpon>Flyout_ToggleMenu.xaml</DependentUpon>
+    </Compile>
     <Compile Include="$(MSBuildThisFileDirectory)Windows_UI_Xaml_Controls\Flyout\Flyout_Unloaded.xaml.cs">
       <DependentUpon>Flyout_Unloaded.xaml</DependentUpon>
     </Compile>

src/SamplesApp/UITests.Shared/Windows_UI_Xaml_Controls/Flyout/Flyout_ToggleMenu.xaml

@@ -0,0 +1,24 @@
+<Page
+    x:Class="UITests.Shared.Windows_UI_Xaml_Controls.Flyout.Flyout_ToggleMenu"
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:local="using:UITests.Windows_UI_Xaml_Controls.Flyout"
+    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+    mc:Ignorable="d"
+    Background="{ThemeResource ApplicationPageBackgroundThemeBrush}"
+	d:DesignHeight="300"
+	d:DesignWidth="400">
+
+	<StackPanel Orientation="Horizontal" Grid.Row="1">
+	  <AppBarButton Icon="Clock" Label="Test">
+		<AppBarButton.Flyout>
+		  <MenuFlyout x:Name="uiMenuDelay">
+			<ToggleMenuFlyoutItem x:Name="test1" Text="test 1"/>
+			<ToggleMenuFlyoutItem x:Name="test2" Text="test 2" IsChecked="True"/>
+			<ToggleMenuFlyoutItem x:Name="test3" Text="test 3"/>
+		  </MenuFlyout>
+		</AppBarButton.Flyout>
+	  </AppBarButton>
+	</StackPanel>
+</Page>

src/SamplesApp/UITests.Shared/Windows_UI_Xaml_Controls/Flyout/Flyout_ToggleMenu.xaml.cs

@@ -0,0 +1,29 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Runtime.InteropServices.WindowsRuntime;
+using Uno.UI.Samples.Controls;
+using Windows.Foundation;
+using Windows.Foundation.Collections;
+using Windows.UI.Xaml;
+using Windows.UI.Xaml.Controls;
+using Windows.UI.Xaml.Controls.Primitives;
+using Windows.UI.Xaml.Data;
+using Windows.UI.Xaml.Input;
+using Windows.UI.Xaml.Media;
+using Windows.UI.Xaml.Navigation;
+
+// The User Control item template is documented at https://go.microsoft.com/fwlink/?LinkId=234236
+
+namespace UITests.Shared.Windows_UI_Xaml_Controls.Flyout
+{
+	[SampleControlInfo("Flyout", "Flyout_ToggleMenu")]
+	public sealed partial class Flyout_ToggleMenu : Page
+	{
+		public Flyout_ToggleMenu()
+		{
+			this.InitializeComponent();
+		}
+	}
+}

src/Uno.UI/UI/Xaml/Controls/MenuFlyout/ToggleMenuFlyoutItem.cs

@@ -13,6 +13,7 @@ public partial class ToggleMenuFlyoutItem : MenuFlyoutItem
 	{
 		public ToggleMenuFlyoutItem()
 		{
+			DefaultStyleKey = typeof(ToggleMenuFlyoutItem);
 		}
 
 		#region IsChecked