Merge pull request 'OZG-6499-Signatur-in-Nachrichten-anzeigen' (#48) from OZG-6499-Signatur-in-Nachrichten-anzeigen into master

Reviewed-on: https://git.ozg-sh.de/ozgcloud-app/administration/pulls/48


Reviewed-by: OZGCloud <ozgcloud@mgm-tp.com>