[TYPO3-core] RFC: Bugfix for #2341: add headers for table CE (accessibility)

[Sebastian Kurfuerst]

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Hi guys,

this is a CVS patch request.

Type:
Bugfix / Accessibility Fix

Problem:

    * for accessibility reasons table markup should use id and headers
      additionally of scope.
    * Both techniques are theoretically ok, but practically scope
      isn't supported by mayor screenreaders. So the table markup
      should use an id for every TH and a headers="id" for
      coresponding data cells.


Solution:

    * add an ID for every table header cell
    * add a "headers="id" for the corresponding data cells


Issues

    * multiple tables on one page have to be supported, that's why the
      UID of the current cObject is added to the ID.


I think it is important to be fixed for Final...

Thanks to Kai Laborenz who wrote the patch in the first place and made
the suggestion.

Greets, Sebastian
PS @Kai: can you check that it works as expected? It does here.
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