In circumstances where all collapsible form sections were expanded on
page load, a check is now made to ensure the expand all/collapse all
button behaves as intended.
* Fix focus outline
* Set aria-expanded state accordingly
* Set aria-expanded in the template to false by default as the default
mode of the link is to expand all the sections.
Reference:
https://www.w3.org/TR/wai-aria-practices-1.1/#disclosure