Dodano tłumaczenie; poprawki

src/locales/en.json

@@ -239,7 +239,10 @@
     "online-since": "ONLINE SINCE",
     "duty-lasted": "The duty lasted",
     "minutes": "{minutes} mins",
-    "hours": "{hours}h {minutes} mins"
+    "hours": "{hours}h {minutes} mins",
+
+    "show-stock": "SHOW STOCK",
+    "hide-stock": "HIDE STOCK"
   },
   "scenery": {
     "users": "PLAYERS ONLINE",

src/locales/pl.json

@@ -241,7 +241,10 @@
     "timetable-day": "Rozkład z dnia",
     "timetable-active": "AKTYWNY",
     "timetable-fulfilled": "WYPEŁNIONY",
-    "timetable-abandoned": "PORZUCONY"
+    "timetable-abandoned": "PORZUCONY",
+
+    "show-stock": "POKAŻ SKŁAD",
+    "hide-stock": "UKRYJ SKŁAD"
   },
   "scenery": {
     "users": "GRACZE ONLINE",