Use .manifest file for apps on Windows

Works with CMake, and also adds DPI awareness to DolphinQt2 (which
wasn't enabled before).

Source/Core/DolphinQt2/DolphinQt2.vcxproj

@@ -65,6 +65,9 @@
     <ResourceCompile>
       <AdditionalIncludeDirectories Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">$(ExternalsDir)/gettext</AdditionalIncludeDirectories>
     </ResourceCompile>
+    <Manifest>
+      <AdditionalManifestFiles>DolphinQt2.manifest;%(AdditionalManifestFiles)</AdditionalManifestFiles>
+    </Manifest>
   </ItemDefinitionGroup>
   <!--QRC and UI files are handled automatically-->
   <ItemGroup>
@@ -236,4 +239,4 @@
     <Message Text="Copy: @(BinaryFiles) -&gt; $(BinaryOutputDir)" Importance="High" />
     <Copy SourceFiles="@(BinaryFiles)" DestinationFolder="$(BinaryOutputDir)" />
   </Target>
-</Project>
+</Project>