message: feature: added markdown edit tab 'privacy' for admin, German translation for headers still missing
diff: <button mat-button routerLink="/admin/users">
  <span>{{ 'common.users' | translate }}</span>
  </button>
  - <button [routerLink]="['/admin/markdownEdit']" [queryParams]="{type: 'imprint', header: 'Imprint'}" mat-button>
  + <button [routerLink]="['/admin/markdownEdit']" [queryParams]="{type: 'imprint', header: 'Legal notice'}" mat-button>
  <span>{{ 'common.imprint' | translate }}</span>
  </button>
  + <button [routerLink]="['/admin/markdownEdit']" [queryParams]="{type: 'privacy', header: 'Privacy'}" mat-button>
  + <span>{{ 'common.privacy' | translate }}</span>
  + </button>
  <button mat-button [routerLink]="['/admin/markdownEdit']" [queryParams]="{type: 'infoBox', header: 'InfoBox'}">
  <span>{{ 'common.infobox' | translate }}</span>
  </button>
  