UHF-10171: Align link buttons and buttons text always on center

[teroelonen]

UHF-10171

What was done

• Aligned link buttons and buttons text always on center.

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-10171_popup_layout_fixes
• Run make drush-cr

How to test

• Create a survey if you don't have one on you local already or sync database from testing where there is already one.
• Make sure that the button texts are always aligned to center. Easily this can be checked on narrow screens.
• Check that code follows our standards.

Continuous documentation

• This feature has been documented/the documentation has been updated
• This change doesn't require updates to the documentation

[github-actions]

⚠️ Visual regression found! Please check if this change is wanted or accidental. You can check the output here: https://city-of-helsinki.github.io/drupal-hdbt/pull/1039/html_report/

[Arkkimaagi]

Good catch, HDS seems to miss this property too in its current and upcoming implementation of link buttons. I'll contact them as well. Approved 😸