refactor: split DOM operations from logics in Accordion
refactor: split DOM operations from logics in Accordion

Split DOM operations from logics in Accordion "up" and "down" methods

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