Issue1585 errors reported by axe accessibility tests must be fixed

[miguelvaara]

Reasons for creating this PR

This is just the beginning of the Draft PR and at this point the intention is not to complete the information requested in the PR template. The goal now is only to make the code more easily viewable for other developers. Detailed information will be provided later!

Link to relevant issue(s), if any

• Closes #

Description of the changes in this PR

Known problems or uncertainties in this PR

Checklist

• phpUnit tests pass locally with my changes
• I have added tests that show that the new code works, or tests are not relevant for this PR (e.g. only HTML/CSS changes)
• The PR doesn't reduce accessibility of the front-end code (e.g. tab focus, scaling to different resolutions, use of .sr-only class, color contrast)
• The PR doesn't introduce unintended code changes (e.g. empty lines or useless reindentation)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (1e049d3) 70.54% compared to head (31123a8) 70.54%.
Report is 23 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #1587   +/-   ##
=========================================
  Coverage     70.54%   70.54%           
  Complexity     1644     1644           
=========================================
  Files            32       32           
  Lines          4315     4315           
=========================================
  Hits           3044     3044           
  Misses         1271     1271           

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[sonarqubecloud]

Quality Gate failed

Failed conditions

E Reliability Rating on New Code (required ≥ A)

See analysis details on SonarCloud

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[miguelvaara]

This is not needed anymore