make SKVFX the default install dir

Ok, this clears up the confusion of the last commit. It now, by default,
installs into the SKVFX directory, so there isn't the directory
name duplication and the user can still safely and quickly choose a
a default install directory.

src/UE_QuickLaunch_installer/Folders.wxs

@@ -1,7 +1,7 @@
 <Wix xmlns="http://wixtoolset.org/schemas/v4/wxs">
   <Fragment>
     <StandardDirectory Id="ProgramFiles6432Folder">
-      <Directory Id="INSTALLFOLDER" Name="!(bind.Property.ProductName)" >
+      <Directory Id="INSTALLFOLDER" Name="!(bind.Property.Manufacturer)" >
         <!-- Example Template folders -->
         <Directory Id="UEQLTemplateFolder" Name="ue_quicklaunch_template" >
         </Directory>