Explicitly include resx file in GitHub.App.

Had to also remove the `<RootNamespace>` as it was causing the resources to get generated in the wrong place.

Author: grokys

src/GitHub.App/GitHub.App.csproj

@@ -1,7 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <TargetFramework>net461</TargetFramework>
-    <RootNamespace>GitHub</RootNamespace>
   </PropertyGroup>
 
   <Import Project="$(SolutionDir)\src\common\signing.props" />
@@ -16,6 +15,21 @@
     <Reference Include="WindowsBase" />
   </ItemGroup>
 
+  <ItemGroup>
+    <Resource Include="Images\*.png" />
+
+    <Compile Update="Resources.Designer.cs">
+      <DependentUpon>Resources.resx</DependentUpon>
+      <DesignTime>True</DesignTime>
+      <AutoGen>True</AutoGen>
+    </Compile>
+
+    <EmbeddedResource Update="Resources.resx">
+      <Generator>PublicResXFileCodeGenerator</Generator>
+      <LastGenOutput>Resources.Designer.cs</LastGenOutput>
+    </EmbeddedResource>
+  </ItemGroup>
+  
   <ItemGroup>
     <ProjectReference Include="..\..\submodules\akavache\Akavache.Sqlite3\Akavache.Sqlite3.csproj" />
     <ProjectReference Include="..\..\submodules\akavache\Akavache\Akavache_Net45.csproj" />