Localize more dates and texts (#341)

* Localize more dates and texts

* Adapt source language to 4-letter code for VS code

* Make page titles more reactive to language change

* Translate missing text + fix missed refactoring

* Fix missed page titles refactoring

* Translate nutrition view

* Translate Image upload vue

* Fix default text being defined twice in upload btn

frontend/src/locales/dateTimeFormats/en-US.json

@@ -3,5 +3,11 @@
     "month": "short",
     "day": "numeric",
     "weekday": "long"
+  },
+  "medium": { 
+    "month": "long",
+    "day": "numeric",
+    "weekday": "long",
+    "year": "numeric"
   }
 }