yarn lint --fix and yarn locales fix in adminarea

admin/src/components/NotFoundPage.vue

@@ -1186,7 +1186,7 @@
       </b-container>
     </div>
     <div class="text-center">
-      <b-button variant="light" @click="$router.go(-1)">zurück</b-button>
+      <b-button variant="light" @click="$router.go(-1)">{{ $t('back') }}</b-button>
     </div>
   </div>
 </template>

admin/src/locales/de.json

@@ -1,5 +1,6 @@
 {
   "all_emails": "Alle Nutzer",
+  "back": "zurück",
   "bookmark": "bookmark",
   "confirmed": "bestätigt",
   "creation": "Schöpfung",

admin/src/locales/en.json

@@ -1,5 +1,6 @@
 {
   "all_emails": "All users",
+  "back": "back",
   "bookmark": "Remember",
   "confirmed": "confirmed",
   "creation": "Creation",