UHF-X accordion overflow fix

[Arkkimaagi]

UHF-X

With the recent improvent to animate the accordions, a bug was introduced where accordions reserve space below footer when they're closed. This is especially visible on pages like Pasilan Peruskoulu that have long content inside accordions.

What was done

• A weird fix was found where setting the hidden content to move with transform property by 0 units, the reserved space goes away in all tested browsers (safari, ff, chrome).

How to install

• Make sure your (KASKO) 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_accordion_overflow_fix
• Run make drush-cr

How to test

• Open for example the Kasko instance Pasilan peruskoulu page. Check that you no longer can scroll past footer.
• Check that code follows our standards

Designers review

• This PR does not need designers review

[khalima]

Good job with this! 👍 🚀