Added language and theme settings.

lang/sv-SE.json

@@ -28,6 +28,7 @@
   "label.enable-share-url": "Aktivera delnings-URL",
   "label.invalid": "Ogiltig",
   "label.invalid-domain": "Ogiltig domän",
+  "label.language": "Language",
   "label.last-days": "Senaste {x} dagarna",
   "label.last-hours": "Senaste {x} timmarna",
   "label.logged-in-as": "Inloggad som {username}",
@@ -50,6 +51,7 @@
   "label.settings": "Inställningar",
   "label.share-url": "Delnings-URL",
   "label.single-day": "En dag",
+  "label.theme": "Theme",
   "label.this-month": "Denna månad",
   "label.this-week": "Denna vecka",
   "label.this-year": "Detta år",