🎩 What? Why?

This PR backports several accessibility fixes to v0.26.

See below for detailed list.

📌 Related Issues

• Heading order related fixes:
  • Fix comments heading order #8876
  • Fix illogical heading order for a single proposal #8877
  • Fix illogical heading order for the versions list #8880
  • Fix logical heading order for the endorsers list #8892
  • Change the participatory space header's subtitle element to a <p> to fix heading order issues #8901
  • Fix the component index views heading order for the subtitle change #8902
  • Fix the form questionnaires heading orders #8903
  • Fix the illogical heading orders with the budget component views #8904
  • Fix illogical heading orders in the elections component #8905
  • Fix heading order in the process steps page #8906
  • Add a subtitle to assemblies and processes pages #8918
  • Add a subtitle to votings page #8919
  • Fix heading order in the consultation question page #8920
• Diff selector fixes
  • Fix diff mode selector roles and tabindexes #8912
  • Fix the HTML diff mode accessibility #8915
• Other fixes
  • Improve logo link aria label #8878
  • Add a unique title to the new group page #8882
  • Add the "choose language" string in all locales to the language chooser #8883
  • Fix emoji picker hiding Foundation Abide form errors #8886
  • Fix Foundation Abide errors for Rails remote (AJAX) forms #8889
  • Change the correct element type for the change password button #8890
  • Make the button link font weight consistent with normal links #8891
  • Fix accessibility issue related to the documents collection toggle #8907
  • Fix duplicate ID on the budgets index page #8908

Testing

See the related PRs.

📋 Checklist

• ❓ CONSIDER adding a unit test if your PR resolves an issue.
• ✔️ DO check open PR's to avoid duplicates.
• ✔️ DO keep pull requests small so they can be easily reviewed.
• ✔️ DO build locally before pushing.
• ✔️ DO make sure tests pass.
• ✔️ DO make sure any new changes are documented in docs/.
• ✔️ DO add and modify seeds if necessary.
• ✔️ DO add CHANGELOG upgrade notes if required.
• ✔️ DO add to GraphQL API if there are new public fields.
• ✔️ DO add link to MetaDecidim if it's a new feature.
• ❌AVOID breaking the continuous integration build.
• ❌AVOID making significant changes to the overall architecture.