title: Add Missing Vendor specifics in Web Essentials 2017
body: <p>I've just recently installed Visual Studio 2017 and Web Essentials 2017. Now i cant find the option to add missing vendor specifics in my scss files. Previously was using VS 2013 with Web Essentials 2013 and it had the option. </p>
  
  <p>Any Ideas how i can get this back?</p>