[TASK] Improve permission icons in Access module

Improve the choice of the permission icons for visually handicapped people.

Resolves: #66030
Releases: master
Change-Id: I68dfd1d16d5da0cb2ea3cd3594f9f469509d5725
Reviewed-on: http://review.typo3.org/38166


Reviewed-by: Mathias Schreiber <mathias.schreiber@wmdb.de>
Tested-by: Mathias Schreiber <mathias.schreiber@wmdb.de>
Reviewed-by: Xavier Perseguers <xavier@typo3.org>
Tested-by: Xavier Perseguers <xavier@typo3.org>