Git commits in Moodle 3.4.5 by Huong Nguyen

commit 7591658a474f0bc7651ed3e3b7e90ce75b7a38a2
Author: Huong Nguyen <huongnv13@gmail.com>
Date:   Wed, 27 Jun 2018 15:32:48 +0800
Tag:    v3.4.5

MDL-62814 Question: Improve column base display_header


commit d49d4dbcd4312b7868404730ae317db0b61c084a
Author: Huong Nguyen <huongnv13@gmail.com>
Date:   Thu, 14 Jun 2018 14:54:39 +0800
Tag:    v3.4.5

MDL-62712 Filepicker: Improve upload process