Add a way to check the NAND for issues and fix them

Old versions of Dolphin are so broken regarding NAND handling that
we need this to repair common issues and avoid issues with titles
like the System Menu or the Wii Shop.

This isn't an exhaustive check, but this will catch most issues
and offer to fix them automatically (if possible).

Source/Core/DolphinWX/Frame.h

@@ -348,6 +348,7 @@ private:
   void OnInstallWAD(wxCommandEvent& event);
   void OnUninstallWAD(wxCommandEvent& event);
   void OnImportBootMiiBackup(wxCommandEvent& event);
+  void OnCheckNAND(wxCommandEvent& event);
   void OnExtractCertificates(wxCommandEvent& event);
   void OnPerformOnlineWiiUpdate(wxCommandEvent& event);
   void OnPerformDiscWiiUpdate(wxCommandEvent& event);