Remove backing page from ContentSizer samples

Bonus also fixes issue with sample loading the first time...

Author: michael-hawker

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

@@ -497,9 +497,6 @@
     <Content Include="SamplePages\DataGrid\DataGridCode.bind" />
     <Content Include="SamplePages\ViewportBehavior\ViewportBehaviorCode.bind" />
     <Compile Include="Common\TextBlockHyperlinkBehavior.cs" />
-    <Compile Include="SamplePages\ContentSizer\ContentSizerPage.xaml.cs">
-      <DependentUpon>ContentSizerPage.xaml</DependentUpon>
-    </Compile>
     <Compile Include="Common\Vector3Converter.cs" />
     <Compile Include="SamplePages\AutoFocusBehavior\AutoFocusBehaviorPage.xaml.cs">
       <DependentUpon>AutoFocusBehaviorPage.xaml</DependentUpon>
@@ -978,10 +975,6 @@
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>
     </Page>
-    <Page Include="SamplePages\ContentSizer\ContentSizerPage.xaml">
-      <Generator>MSBuild:Compile</Generator>
-      <SubType>Designer</SubType>
-    </Page>
     <Page Include="SamplePages\AutoFocusBehavior\AutoFocusBehaviorPage.xaml">
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>

Microsoft.Toolkit.Uwp.SampleApp/SamplePages/ContentSizer/ContentSizerPage.xaml

@@ -50,6 +50,7 @@
                 <controls:Case IsDefault="True" />
             </controls:CaseCollection>
         </controls:SwitchPresenter>
+        <controls:ContentSizer x:Key="ContentSizerControl" />
         <controls:ConstrainedBox x:Key="ConstrainedBoxControl" />
         <media:AttachedCardShadow x:Key="AttachedShadow" />
         <ui:AttachedDropShadow x:Key="AttachedDropShadow" />

Microsoft.Toolkit.Uwp.SampleApp/SamplePages/ContentSizer/ContentSizerPage.xaml.cs

@@ -177,11 +177,10 @@
       },
       {
         "Name": "ContentSizer",
-        "Type": "ContentSizerPage",
         "Subcategory": "Layout",
         "About": "ContentSizer is a general sizing control which can manipulate the size of its parent or other elements. Used as a building block for more complex UI systems.",
         "CodeUrl": "https://github.com/windows-toolkit/WindowsCommunityToolkit/tree/main/Microsoft.Toolkit.Uwp.UI.Controls.Layout/ContentSizer",
-        "XamlCodeFile": "ContentSizer.bind",
+        "XamlCodeFile": "/SamplePages/ContentSizer/ContentSizer.bind",
         "Icon": "/SamplePages/ContentSizer/ContentSizer.png",
         "DocumentationUrl": "https://raw.githubusercontent.com/MicrosoftDocs/WindowsCommunityToolkitDocs/master/docs/controls/ContentSizer.md"
       },