Git commits in Moodle 3.5.0 by vinhle

commit 8e0bebd1cd4e6ac87d224b64ff9c4a7c5e65a74b
Author: vinhle <lethevinh.qng@gmail.com>
Date:   Mon, 23 Apr 2018 15:52:26 +0800
Tag:    v3.5.0-rc1

MDL-61715 question: qbank_chooser is not intelligent about headings