Developer credits
Git commits in Moodle 3.1.x by JD
commit 9b81a977e13d613c61634c0d580129e48b10bccc Author: JD <jdescoteaux@hotmail.com> Date: Wed, 13 Jul 2016 07:45:08 +0800 Tag: v3.1.2 MDL-54977 blocks_navigation: Use html_writer::random_id for id
commit 9b81a977e13d613c61634c0d580129e48b10bccc Author: JD <jdescoteaux@hotmail.com> Date: Wed, 13 Jul 2016 07:45:08 +0800 Tag: v3.1.2 MDL-54977 blocks_navigation: Use html_writer::random_id for id