[TASK] Streamline translation flags in list module

This patch wrap the translation flags in list module into a button group.

Resolves: #71025
Releases: master
Change-Id: Ibac86b53364a5f779e4a79c828b86540c86d67a9
Reviewed-on: https://review.typo3.org/44282


Reviewed-by: Daniel Goerz <ervaude@gmail.com>
Tested-by: Daniel Goerz <ervaude@gmail.com>
Reviewed-by: Michael Oehlhof <typo3@oehlhof.de>
Tested-by: Michael Oehlhof <typo3@oehlhof.de>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>