UHF-X: Add missing quotes around html attribute values

[Arkkimaagi]

UHF-X

Siteimprove was complaining about duplicate ids on a page: https://www.hel.fi/fi/paatoksenteko-ja-hallinto/sisallonhallinta/sivujen-rakentaminen-drupalissa/sivupohjat-ja-niiden-valinta/perussivu/esimerkki

It turned out that we had a id that leaked its contents as it did not have quotes arounds its empty value.

What was done

• Checked for other such problems and found potential problems in multiple places.
• The places where attributes were set without quotes were fixed in this PR
• The id did not have contents because the variable was misnamed, this was fixed

How to install

• Make sure your instance is up and running on latest dev branch.
  • git pull origin dev
  • make fresh
• Update the HDBT theme
  • composer require drupal/hdbt:dev-UHF-X_fix_html_attributes_missing_quotes
• Run make drush-cr

How to test

• Check that the new accordions still work
• Check that menu links with lang attribute still work
• Check that pager still works
• Check that code follows our standards

Designers review

• This PR does not need designers review