Reuse the IOS code for WAD installation

* Less code and logic duplication.

* Fixes a bug with the data dir not being created, steps being done in
  the wrong order.

Source/Core/UICommon/UICommon.vcxproj

@@ -59,12 +59,14 @@
     <ClCompile Include="USBUtils.cpp">
       <DisableSpecificWarnings>4200;%(DisableSpecificWarnings)</DisableSpecificWarnings>
     </ClCompile>
+    <ClCompile Include="WiiUtils.cpp" />
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="CommandLineParse.h" />
     <ClInclude Include="UICommon.h" />
     <ClInclude Include="Disassembler.h" />
     <ClInclude Include="USBUtils.h" />
+    <ClInclude Include="WiiUtils.h" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="$(ExternalsDir)cpp-optparse\cpp-optparse.vcxproj">
@@ -74,4 +76,4 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
   <ImportGroup Label="ExtensionTargets">
   </ImportGroup>
-</Project>
+</Project>