In edit mode xwiki launch an http request to an external internet site (cdnjs.cloudflare.com)

Hello,
With xwiki 6.4.3 and with empty jetty package 7.0.1, on edit mode, xwiki launch an http request to get:
http://cdnjs.cloudflare.com/ajax/libs/jstree/3.0.8/jstree.min.js
It is annoying for enterprise behind an proxy/firewall.

Perhaps, it is better to copy/use jstree.min.js in ./WEB-INF/lib/ directory?

Is seem that source code is on this file: https://github.com/xwiki/xwiki-platform/blob/master/xwiki-platform-core/xwiki-platform-tree/xwiki-platform-tree-webjar/src/main/resources/require-config.js

Thxs

Pascal B.