Git commits in Moodle 3.4.4 by Huong Nguyen

commit 70c2cb7266985968a00297a90c93503a219502c5
Author: Huong Nguyen <huongnv13@gmail.com>
Date:   Thu, 31 May 2018 15:29:18 +0800
Tag:    v3.4.4

MDL-62614 Privacy: Core tag provider delete_item_tags function not work

commit 132169831f35acb034ed75b52d122e632e49da57
Author: Huong Nguyen <huongnv13@gmail.com>
Date:   Tue, 22 May 2018 17:11:52 +0800
Tag:    v3.4.4

MDL-62358 Question: Improve number function