Fix expanded menu #8325
Fix expanded menu #8325

Fix https://github.com/zurb/foundation-sites/issues/8325.
See also: https://github.com/zurb/foundation-sites/pull/8779. Thanks to
@natewiebe13.

`.expanded` is a modifier for a horizontal menu, and should not be
applied on a vertical one.

Changes:
- Move the `.expanded` modifier after `.horizontal` and before
`.vertical`.
- Add the `.expanded` modifiers for each breakpoint with the
corresponding prefixes.

Other changes:
- Use `-zf-each-breakpoint` to generate responsive modifiers.

Note: The `.expanded` modifier should be applied only when the menu is
horizontal. For example, on a menu which is made horizontal on the
medium breakpoint, `.medium-expanded` should be used :
`.menu.vertical.medium-horizontal.medium-expanded`.

brettsmason/foundation-sites,jaylensoeur/foundation-sites-6,PassKitInc/foundation-sites,atmmarketing/foundation-sites,ucla/foundation-sites,denisahac/foundation-sites,samuelmc/foundation-sites,dragthor/foundation-sites,atmmarketing/foundation-sites,aoimedia/foundation,IamManchanda/foundation-sites,jeromelebleu/foundation-sites,natewiebe13/foundation-sites,ucla/foundation-sites,abdullahsalem/foundation-sites,natewiebe13/foundation-sites,zurb/foundation-sites,dragthor/foundation-sites,brettsmason/foundation-sites,colin-marshall/foundation-sites,zurb/foundation-sites,jamesstoneco/foundation-sites,Owlbertz/foundation,aoimedia/foundation,zurb/foundation-sites,dragthor/foundation-sites,colin-marshall/foundation-sites,abdullahsalem/foundation-sites,Owlbertz/foundation,aoimedia/foundation,zurb/foundation,IamManchanda/foundation-sites,jeromelebleu/foundation-sites,brettsmason/foundation-sites,PassKitInc/foundation-sites,jeromelebleu/foundation-sites,Owlbertz/foundation,andycochran/foundation-sites,natewiebe13/foundation-sites,atmmarketing/foundation-sites,zurb/foundation,ucla/foundation-sites,BerndtGroup/TBG-foundation-sites,IamManchanda/foundation-sites,jaylensoeur/foundation-sites-6,DaSchTour/foundation-sites,andycochran/foundation-sites,Owlbertz/foundation,jamesstoneco/foundation-sites,BerndtGroup/TBG-foundation-sites,abdullahsalem/foundation-sites,samuelmc/foundation-sites,zurb/foundation,BerndtGroup/TBG-foundation-sites,denisahac/foundation-sites,jaylensoeur/foundation-sites-6,DaSchTour/foundation-sites,denisahac/foundation-sites,samuelmc/foundation-sites,andycochran/foundation-sites,PassKitInc/foundation-sites,jamesstoneco/foundation-sites,colin-marshall/foundation-sites