Move DropShadowPanel sample into shared folder and remove backing page for simplification

Microsoft.Toolkit.Uwp.SampleApp/Microsoft.Toolkit.Uwp.SampleApp.csproj

@@ -315,10 +315,10 @@
     <Content Include="SamplePages\FocusTracker\FocusTracker.png" />
     <Content Include="SamplePages\BladeView\BladeView.png" />
     <Content Include="SamplePages\Carousel\Carousel.png" />
-    <Content Include="SamplePages\DropShadowPanel\DropShadowPanel.png" />
+    <Content Include="SamplePages\Shadows\DropShadowPanel.png" />
     <Content Include="SamplePages\Expander\Expander.png" />
-    <Content Include="SamplePages\DropShadowPanel\Trex.png" />
-    <Content Include="SamplePages\DropShadowPanel\Unicorn.png" />
+    <Content Include="SamplePages\Shadows\Trex.png" />
+    <Content Include="SamplePages\Shadows\Unicorn.png" />
     <Content Include="SamplePages\GazeInteraction\GazeInteraction.png" />
     <Content Include="SamplePages\GazeTracing\GazeTracing.png" />
     <Content Include="SamplePages\GridSplitter\GridSplitter.png" />
@@ -397,7 +397,7 @@
     <Content Include="SamplePages\ImageCache\ImageCacheXaml.bind" />
     <Content Include="SamplePages\Incremental Loading Collection\IncrementalLoadingCollectionCode.bind" />
     <Content Include="SamplePages\ImageCache\ImageCacheCode.bind" />
-    <Content Include="SamplePages\DropShadowPanel\DropShadowPanelXaml.bind" />
+    <Content Include="SamplePages\Shadows\DropShadowPanelXaml.bind" />
     <Content Include="SamplePages\Object Storage\ObjectStorageCode.bind" />
     <Content Include="SamplePages\BackgroundTaskHelper\BackgroundTaskHelperCode.bind" />
     <Content Include="SamplePages\ListDetailsView\ListDetailsView.bind" />
@@ -809,9 +809,6 @@
     <Compile Include="SamplePages\DispatcherQueueHelper\DispatcherQueueHelperPage.xaml.cs">
       <DependentUpon>DispatcherQueueHelperPage.xaml</DependentUpon>
     </Compile>
-    <Compile Include="SamplePages\DropShadowPanel\DropShadowPanelPage.xaml.cs">
-      <DependentUpon>DropShadowPanelPage.xaml</DependentUpon>
-    </Compile>
     <Compile Include="SamplePages\Expander\ExpanderPage.xaml.cs">
       <DependentUpon>ExpanderPage.xaml</DependentUpon>
     </Compile>
@@ -1269,10 +1266,6 @@
       <Generator>MSBuild:Compile</Generator>
       <SubType>Designer</SubType>
     </Page>
-    <Page Include="SamplePages\DropShadowPanel\DropShadowPanelPage.xaml">
-      <SubType>Designer</SubType>
-      <Generator>MSBuild:Compile</Generator>
-    </Page>
     <Page Include="SamplePages\GridSplitter\GridSplitterPage.xaml">
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>

Microsoft.Toolkit.Uwp.SampleApp/SamplePages/DropShadowPanel/DropShadowPanelPage.xaml

@@ -1,26 +0,0 @@
-<Page x:Class="Microsoft.Toolkit.Uwp.SampleApp.SamplePages.DropShadowPanelPage"
-      xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
-      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-      xmlns:controls="using:Microsoft.Toolkit.Uwp.UI.Controls"
-      xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
-      xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-      mc:Ignorable="d">
-
-    <Page.Resources>
-        <Style x:Key="TitleText"
-               TargetType="TextBlock">
-            <Setter Property="Margin" Value="5,20,0,5" />
-            <Setter Property="FontSize" Value="16" />
-            <Setter Property="Foreground" Value="{ThemeResource Brush-Grey-03}" />
-            <Setter Property="HorizontalAlignment" Value="Left" />
-        </Style>
-        <Style x:Key="DividingBorder"
-               TargetType="Border">
-            <Setter Property="BorderThickness" Value="0,0,0,1" />
-            <Setter Property="BorderBrush" Value="Black" />
-            <Setter Property="Margin" Value="0,0,0,20" />
-        </Style>
-    </Page.Resources>
-
-    <Grid x:Name="XamlRoot"/>
-</Page>

Microsoft.Toolkit.Uwp.SampleApp/SamplePages/DropShadowPanel/DropShadowPanelPage.xaml.cs

@@ -1,22 +0,0 @@
-// Licensed to the .NET Foundation under one or more agreements.
-// The .NET Foundation licenses this file to you under the MIT license.
-// See the LICENSE file in the project root for more information.
-
-using Windows.UI.Xaml.Controls;
-
-namespace Microsoft.Toolkit.Uwp.SampleApp.SamplePages
-{
-    /// <summary>
-    /// A page that shows how to use the DropShadowPanel control.
-    /// </summary>
-    public sealed partial class DropShadowPanelPage : Page
-    {
-        /// <summary>
-        /// Initializes a new instance of the <see cref="DropShadowPanelPage"/> class.
-        /// </summary>
-        public DropShadowPanelPage()
-        {
-            InitializeComponent();
-        }
-    }
-}

Microsoft.Toolkit.Uwp.SampleApp/SamplePages/Shadows/DropShadowPanelXaml.bind

@@ -88,7 +88,7 @@
                                     VerticalAlignment="Center"
                                     HorizontalAlignment="Center"
                                     IsMasked="@[Is Masked]">
-            <Image Width="200" Source="/SamplePages/DropShadowPanel/Unicorn.png" Stretch="Uniform" />
+            <Image Width="200" Source="/SamplePages/Shadows/Unicorn.png" Stretch="Uniform" />
           </controls:DropShadowPanel>
           <controls:DropShadowPanel BlurRadius="@[BlurRadius]"
                                     ShadowOpacity="@[Opacity]"
@@ -98,7 +98,7 @@
                                     VerticalAlignment="Center"
                                     HorizontalAlignment="Center"
                                     IsMasked="@[Is Masked]">
-            <Image Width="200" Source="/SamplePages/DropShadowPanel/Trex.png" Stretch="Uniform" />
+            <Image Width="200" Source="/SamplePages/Shadows/Trex.png" Stretch="Uniform" />
           </controls:DropShadowPanel>
         </StackPanel>
       </StackPanel>

Microsoft.Toolkit.Uwp.SampleApp/SamplePages/XamlOnlyPage.xaml

@@ -49,6 +49,7 @@
             </controls:CaseCollection>
         </controls:SwitchPresenter>
         <controls:ConstrainedBox x:Key="ConstrainedBoxControl" />
+        <controls:DropShadowPanel x:Key="DropShadowPanel" />
     </Page.Resources>
 
     <Grid>

Microsoft.Toolkit.Uwp.SampleApp/SamplePages/samples.json

@@ -185,13 +185,11 @@
       },
       {
         "Name": "DropShadowPanel",
-        "Type": "DropShadowPanelPage",
         "Subcategory": "Media",
         "About": "DropShadowPanel contol allows the creation of a DropShadow for any Xaml FrameworkElement in markup.",
         "CodeUrl": "https://github.com/CommunityToolkit/WindowsCommunityToolkit/tree/main/Microsoft.Toolkit.Uwp.UI.Controls.Core/DropShadowPanel",
-        "XamlCodeFile": "DropShadowPanelXaml.bind",
-        "Icon": "/SamplePages/DropShadowPanel/DropShadowPanel.png",
-        "BadgeUpdateVersionRequired": "Anniversary Update required",
+        "XamlCodeFile": "/SamplePages/Shadows/DropShadowPanelXaml.bind",
+        "Icon": "/SamplePages/Shadows/DropShadowPanel.png",
         "DocumentationUrl": "https://raw.githubusercontent.com/MicrosoftDocs/WindowsCommunityToolkitDocs/master/docs/controls/DropShadowPanel.md"
       },
       {