Update of Danish translation (#185)

_locales/da/messages.json

@@ -80,7 +80,7 @@
     "description": "Error message when an input field is empty but has to have a value"
   },
   "change_later_reminder": {
-    "message": "Du kan ændre denne indstillinger under Indstillinger senere",
+    "message": "Du kan altid ændre dette valg under indstillinger",
     "description": "Checkbox label text for decision confirmations"
   },
   "check_selected_items": {
@@ -657,6 +657,22 @@
     "message": "Forsøg at finde links via hjemmesidens tekstindhold (langsommere)",
     "description": "Preferences/General"
   },
+  "pref_theme": {
+    "message": "Tema",
+    "description": "label text"
+  },
+  "pref_theme_dark": {
+    "message": "Mørkt",
+    "description": "option text"
+  },
+  "pref_theme_default": {
+    "message": "System/browser",
+    "description": "option text"
+  },
+  "pref_theme_light": {
+    "message": "Lyst",
+    "description": "option text"
+  },
   "pref_ui": {
     "message": "Brugergrænseflade",
     "description": "Preferences/General; group text"
@@ -716,7 +732,7 @@
     "description": "Action for removing complete downloads"
   },
   "remove_complete_downloads_question": {
-    "message": "Vil du rydde alle færdiggjorte downloads?",
+    "message": "Vil du rydde op i alle færdiggjorte downloads?",
     "description": "Messagebox text"
   },
   "remove_complete_filter_downloads_question": {
@@ -770,7 +786,7 @@
     "description": "Menu text"
   },
   "remove_downloads_title": {
-    "message": "Er du sikker på, du vil rydde downloads?",
+    "message": "Er du sikker på, du vil rydde op i downloads?",
     "description": "Messagebox title; manager"
   },
   "remove_download_question": {
@@ -800,7 +816,7 @@
     "description": "Menu text"
   },
   "remove_missing_downloads_question": {
-    "message": "Vil du rydde alle manglende downloads?",
+    "message": "Vil du rydde op i alle manglende downloads?",
     "description": "Messagebox text"
   },
   "remove_paused_downloads": {