chore: Translate transifex_input.json in da

98% of minimum 50% translated source file: 'transifex_input.json'
on 'da'.

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

translations/frontend-app-learning/src/i18n/messages/da.json

@@ -32,9 +32,11 @@
   "learn.coursewareSerch.searchResultsNone": "Ingen resultater fundet.",
   "learn.coursewareSerch.searchResultsLabel": "Results for \"{keyword}\":",
   "learn.coursewareSerch.searchResultsError": "Der opstod en fejl i søgeprocessen. Prøv venligst igen om et par minutter. Hvis problemet fortsætter, bedes du kontakte supportteamet.",
-  "learn.coursewareSerch.filter:none": "Alt indhold",
+  "learn.coursewareSerch.filter:all": "All content",
   "learn.coursewareSerch.filter:text": "Tekst",
   "learn.coursewareSerch.filter:video": "Video",
+  "learn.coursewareSerch.filter:sequence": "Section",
+  "learn.coursewareSerch.filter:other": "Other",
   "learning.dates.badge.completed": "Fuldført",
   "learning.dates.badge.dueNext": "Forfalder næste gang",
   "learning.dates.badge.pastDue": "Ikke betalt til tiden",