Fix/tabs accessibility

[odero]

For reviewers: click the individual commits for review. You can skip the "Fix spacing and indentation commit" - it's why I had it as a separate commit

Fixes

• tab dropdowns - fixed aira -> aria typos; added aria-haspopup="true" aria-expanded="false" for the reader
• removed tabindex=-1 since it was resulting in incorrect navigation when hitting tab to move across elements

[gathogojr]

@odero This pull request is extremely hard to review. It's hard to pick out the material changes in the diff. I think the html formatting changes should have been made in a different pull request.

[wandeg]

Do you have before and after screenshots?

[habbes]

Could you update the description with a summary of the issue, the changes made and how they fix the issue?

[odero]

@gathogojr, @habbes - see the PR description - @wandeg - it's a screen-reader fix, can't capture a screenshot for that

[odero]

Deleted the spacing and indentation commit. Only showing actual changes now

[marabooy]

Could you confirm if the js code in line 1366 needs to be updated to not trap user focus using tab index or probably works great now