feat: Translate frontend/src/i18n/en.json in no

99% of minimum 50% translated source file: 'frontend/src/i18n/en.json'
on 'no'.

Sync of partially translated files: 
untranslated content is included with an empty translation 
or source language content depending on file format

frontend/src/i18n/no.json

@@ -261,6 +261,6 @@
     "hours": "Timer",
     "minutes": "Minutt",
     "seconds": "Sekunder",
-    "unit": "Time Unit"
+    "unit": "Time format"
   }
 }