To add to what Gioan said - this confusing interface quirk will go away once the rest of the configuration file types are supported by the WebDAV editing interface.
One bonus of the new interface is that any of the files supported by it can now be edited using a WebDAV client (and a tool or text editor of your choice) see: Manage configuration files, templates and web resources using WebDAV - Funnelback Documentation - Version 15.24.0