Git commits in Moodle 3.1.4 by Ilya Tregubov

commit d6f74c49370f66b0d3c94fd304ef56cdb5c3ac0a
Author: Ilya Tregubov <ilya@catalyst-au.net>
Date:   Tue, 06 Dec 2016 11:51:16 +0800
Tag:    v3.1.4

MDL-55906 table: Update user preferences table when reset preferences