fix: close the active Tab when going back to a "tab-less" history state
fix: close the active Tab when going back to a "tab-less" history state

See https://github.com/zurb/foundation-sites/pull/11477#issuecomment-419678146

zurb/foundation,abdullahsalem/foundation-sites,DaSchTour/foundation-sites,abdullahsalem/foundation-sites,zurb/foundation,zurb/foundation-sites,denisahac/foundation-sites,zurb/foundation-sites,zurb/foundation-sites,DaSchTour/foundation-sites,denisahac/foundation-sites,denisahac/foundation-sites,abdullahsalem/foundation-sites,zurb/foundation