Git commits in Moodle 3.5.6 by zpottie

commit b22947d3b7dd82b9122d9357ae2eba67244510a2
Author: zpottie <zander.potgieter@learningworks.co.nz>
Date:   Thu, 24 Jan 2019 06:55:00 +0800
Tag:    v3.5.6

MDL-58315 core: Add support for custom block classes in Boost