- The current item should be focusable otherwise the focus will be lost
as soon as a user clicks on an item in the initials bar
- Modified behat tests to not mistakenly click on the 'All' link
- Use the nav tag because each item in the initials bar is a
navigation link within the current document
- The currently selected item is specified by aria-current
- Useed aria-current=true rather than =page because the links of each
item in the initials bar is missing the pagination information
