Git commits in Moodle 3.6.7 by Raphaël Santos

commit 5c37c61b425e60f699fb75b993fd39c92a56b212
Author: Raphaël Santos <raphael.santos@liip.ch>
Date:   Wed, 21 Aug 2019 15:55:04 +0800
Tag:    v3.6.7

MDL-66409 mod_lesson: Fix editing of numerical pages