The existing behaviour focused the form control
for each popup (radios or textbox) when opened.
This gives no indication the submit button or
cancel link have been added to the page.
These changes:
- make the parent element a region to group all
the new content
- label the region to link it to the button that
opened it
- add a description to the region so users know
how to use it and that all the controls have
been added to the page
Suggested by the Digital Accessibility Centre in
their report. Giving these buttons
aria-expanded=false indicates:
- they control a section on the page
- that section is collapsed (and so clicking the
button will open it)
