Gnav Accessibility Audit

[auniverseaway]

Some loose notes:

1. Add ID to tie menu to link / button "aria-controls"
2. Add JS for arrow nav in global nav
3. Esc to close current menu - restore focus to current menu link
4. Search icon turn to close
5. Loop focus back to search field
6. Make search cards a list - Add aria label to list
7. Use mark tag instead of span for search highlight
8. Make search bar a modal - role=dialog / aria-modal="true"
9. When opening in new tab, use hidden span for disclosing opening in new tab.

https://w3c.github.io/aria-practices/examples/disclosure/disclosure-navigation.html <-- Sample nav