Disable HTML-based browseable Geocortex/Essentials/Rest/sites directory (similar feature in ArcGIS Server)

Suggest a similar configuration be available within the Geocortex Sites directory that Esri makes easily configurable.

Esri provides a way to disable the services directory, so when accessing the domain.com/arcgis/rest/ directory, one is  presented message "Services Directory has been disabled" - These can still be accssed with json by the HTML5 application.

http://server.arcgis.com/en/server/10.3/administer/linux/disabling-the-services-directory.htm

The Services Directory provides a browseable HTML-based representation of all your ArcGIS Server web services and the actions you can perform on them through REST. The Services Directory can be a useful development tool; however, Esri recommends that you disable the Services Directory for production systems when you don't want users browsing your list of services, finding your services in a web search, or making requests to your services through HTML forms.