Max_File_Size setting in System Console > File Settings (#3070)

i18n/en.json

@@ -2391,6 +2391,10 @@
     "id": "model.config.is_valid.sql_idle.app_error",
     "translation": "Invalid maximum idle connection for SQL settings.  Must be a positive number."
   },
+  {
+    "id": "model.config.is_valid.max_file_size.app_error",
+    "translation": "Invalid max file size for file settings. Must be a zero or positive number."
+  },
   {
     "id": "model.config.is_valid.sql_max_conn.app_error",
     "translation": "Invalid maximum open connection for SQL settings.  Must be a positive number."