ManageEngine SDP is missing a key feature on templates and that is a user name injector/placeholder for the currently logged in user that is responding to a ticket.

We need to be able to inject the current user name (object property `sdp_user.USERNAME`) using a placeholder such as by the normal placeholders (i.e $RequestId or $Title).

We've tried to add custom javascript to [ME]/servicedesk/custom/scripts/customscripts.js but this file is never loaded on the browser. How do we enable this file to load on every page?