Fix casing in translations

dashboard/README.md has information of the casing style

dashboard/public/translation/nl.json

@@ -362,7 +362,9 @@
             "id": "Id",
             "date": "Datum",
             "version": "Versie",
-            "list": "Bevat backups van {{appCount}} apps"
+            "list": "Verwijst naar backups van {{ appCount }} app(s)",
+            "size": "Grootte",
+            "duration": "Duur"
         },
         "configureBackupSchedule": {
             "title": "Configureer Backup Planning en Bewaartermijn",
@@ -1568,7 +1570,8 @@
     "backup": {
         "target": {
             "label": "Backup Locatie",
-            "size": "Grootte"
+            "size": "Grootte",
+            "fileCount": "Bestanden"
         },
         "sites": {
             "title": "Backup Locaties",