Public: added translation for room cover

public/locales/en/Common.json

@@ -414,6 +414,7 @@
   "RoomAdmin": "Room admin",
   "RoomList": "Room list",
   "Rooms": "Rooms",
+  "RoomCover": "Room cover",
   "SameEmail": "You can't use the same email address",
   "SaveButton": "Save",
   "SaveHereButton": "Save here",
@@ -531,6 +532,7 @@
   "WantToContinue": "Are you sure you want to continue?",
   "Warning": "Warning",
   "Website": "Website",
+  "WithoutIcon": "Without icon",
   "Yes": "Yes",
   "Yesterday": "Yesterday",
   "You": "You",

public/locales/ru/Common.json

@@ -507,6 +507,7 @@
   "WantToContinue": "Вы уверены, что хотите продолжить?",
   "Warning": "Внимание",
   "Website": "Веб-сайт",
+  "WithoutIcon": "Без иконки",
   "Yes": "Да",
   "Yesterday": "Вчера",
   "You": "Вы"