Revert "Generate base vertical classes without `vertical-grid` prefix so its more flexible."
Revert "Generate base vertical classes without `vertical-grid` prefix so its more flexible."

This reverts commit 4f6ff07f3b5cb996e10b05677a06ab9979f3d031.

denisahac/foundation-sites,zurb/foundation,dragthor/foundation-sites,brettsmason/foundation-sites,IamManchanda/foundation-sites,dragthor/foundation-sites,jeromelebleu/foundation-sites,zurb/foundation,jaylensoeur/foundation-sites-6,colin-marshall/foundation-sites,IamManchanda/foundation-sites,denisahac/foundation-sites,abdullahsalem/foundation-sites,jamesstoneco/foundation-sites,zurb/foundation,ucla/foundation-sites,denisahac/foundation-sites,Owlbertz/foundation,jamesstoneco/foundation-sites,aoimedia/foundation,jaylensoeur/foundation-sites-6,atmmarketing/foundation-sites,Owlbertz/foundation,ucla/foundation-sites,dragthor/foundation-sites,colin-marshall/foundation-sites,abdullahsalem/foundation-sites,DaSchTour/foundation-sites,jeromelebleu/foundation-sites,IamManchanda/foundation-sites,colin-marshall/foundation-sites,zurb/foundation-sites,zurb/foundation-sites,brettsmason/foundation-sites,jaylensoeur/foundation-sites-6,Owlbertz/foundation,jeromelebleu/foundation-sites,aoimedia/foundation,atmmarketing/foundation-sites,ucla/foundation-sites,abdullahsalem/foundation-sites,DaSchTour/foundation-sites,jamesstoneco/foundation-sites,atmmarketing/foundation-sites,aoimedia/foundation,Owlbertz/foundation,zurb/foundation-sites,brettsmason/foundation-sites