Resolve "Erweiterung der Courseware-Zertifikate"

db/migrations/5.5.9_extend_cw_certificates.php

lib/classes/CoursewarePDFCertificate.php

lib/classes/JsonApi/RouteMap.php

lib/classes/JsonApi/Routes/Courseware/CertificateShow.php

lib/cronjobs/courseware.php

lib/models/Courseware/Certificate.php

lib/models/Courseware/Instance.php

resources/assets/stylesheets/scss/courseware.scss

...rces/assets/stylesheets/scss/courseware/layouts/tile.scss

...ces/vue/components/courseware/unit/CoursewareUnitItem.vue

...ents/courseware/unit/CoursewareUnitItemDialogSettings.vue

templates/courseware/mails/certificate.php

templates/layouts/base.php