Pull Request for Issue #.

Summary of Changes

To be accessible a table must have a header.
See for examle this checklist: https://dequeuniversity.com/checklists/web/tables

Joomla provides a param show_headings for frontend tables. This removes the table header.

This PR sets the table header visually-hidden so it is still present for assistive technologies.

I open some similar PRs to make testing easier.

Testing Instructions

You need at least one article
Make a menu Item of type category list.
Set param table_headings in tab "list layouts" to "hide"
See the view and sourcecode ot the table in frontend

Actual result BEFORE applying this Pull Request

There is no table heading visible, also in source code.

Expected result AFTER applying this Pull Request

There is no table heading visible, but it is in sourcecode with class="visually-hidden"

Link to documentations

Please select:

• Documentation link for docs.joomla.org:

• No documentation changes for docs.joomla.org needed

• Pull Request link for manual.joomla.org:

• No documentation changes for manual.joomla.org needed