UHF-10374

What was done

• Removed unused styles referring to class .news-listing--teasers
• Updated all instances of color-silver-light to color-black-5.

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-10374
• Run make drush-cr

How to test

• All the elements that use color-silver-light (#f7f7f8) as background color should now be changed to use the color-black-5 instead. This includes but is not limited to:

• announcements
• Early childhood education fee calculator
• header search
• table of contents
• mobile menu
• unit contact information block on the unit page
• content cards paragraph
• hearings paragraph
• ploughing schedule
• popular services
• react searches
• service list search
• target group links
• unit contact card
• unit search

I don't think its required to test all of these elements but check some and check the code.

• I checked all the items and flagged announcements and job search for design that after this change the contrast on those elements and their other parts are a bit weak. They will be resolved on a different ticket.
• 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

Other PRs

• UHF-10374: Change the color-silver-light to color-black-5 #1171
• UHF-10374: Change the color-silver-light to color-black-5  drupal-helfi-kymp#1033
• UHF-10374: Change the color-silver-light to color-black-5 drupal-helfi-kasvatus-koulutus#782
• UHF-10374: Change the color-silver-light to color-black-5 drupal-helfi-rekry#669
• UHF-10374: Change the color-silver-light to color-black-5 drupal-kaupunkitieto#87
• UHF-10374: Change the color-silver-light to color-black-5 hel-fi-drupal-grants#1637