update en-US

lib/locales/en-US/translation.json

@@ -297,7 +297,8 @@
         "Custom CSS": "Custom CSS",
         "write_CSS": "You can write CSS that is applied to whole system.",
         "reflect_change": "You need to reload the page to reflect the change.",
-        "ctrl_space": "Ctrl+Space to Autocomplete"
+        "ctrl_space": "Ctrl+Space to Autocomplete",
+        "Custom script": "Custom script"
         
       }
 }