[PowerToys Run] Updated (plugin) icons with MDL2 (#4149)

* Updated (plugin) icons with MDL2

* Image wasn't updating

* Based on feedback, updated app icon and windowwalker icon

* Updated app icon

* Updated Window Walker icon

* Change build action / Copy to output directory to None and Do Not Copy - like it was originally

* Fix

* Fix

* Resized images

* Added theme awereness based on somil55s PR

* Added theming to Shell and WindowWalker

* Revert "Added theming to Shell and WindowWalker"

This reverts commit f492c4efdb.

* Revert "Added theme awereness based on somil55s PR"

This reverts commit 8edd3226be.

* Typo fix

* Added new theming support for the new Calculator, Shell and WindowWalker icons

* Added Unit test reference back in

src/modules/launcher/Plugins/Microsoft.Plugin.Shell/Microsoft.Plugin.Shell.csproj

@@ -38,9 +38,6 @@
   </PropertyGroup>
   
   <ItemGroup>
-    <None Include="Images\user.png">
-      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
-    </None>
     <Content Include="Languages\en.xaml">
       <Generator>MSBuild:Compile</Generator>
       <SubType>Designer</SubType>
@@ -74,12 +71,6 @@
     </None>
   </ItemGroup>
   
-  <ItemGroup>
-    <None Include="Images\shell.png">
-      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
-    </None>
-  </ItemGroup>
-  
   <ItemGroup>
     <Content Include="Languages\pl.xaml">
       <Generator>MSBuild:Compile</Generator>
@@ -103,5 +94,20 @@
     <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
     <PackageReference Include="System.Runtime" Version="4.3.1" />
   </ItemGroup>
+  
+  <ItemGroup>
+    <None Update="Images\shell.dark.png">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
+    <None Update="Images\shell.light.png">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
+    <None Update="Images\user.dark.png">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
+    <None Update="Images\user.light.png">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </None>
+  </ItemGroup>
 
 </Project>