Git commits in Moodle 3.11.8 by Huong Nguyen

commit 47e66ef9d183890d4ccb767641a6a2c6ed3986d5
Author: Huong Nguyen <huongnv13@gmail.com>
Date:   Tue, 07 Jun 2022 13:05:27 +0800
Tag:    v3.11.8

MDL-73774 timeline: Prevent ID duplication


commit 01222cbb06f9d077b772adf3054dfbb1a3bf2cb0
Author: Huong Nguyen <huongnv13@gmail.com>
Date:   Thu, 02 Jun 2022 10:20:12 +0800
Tag:    v3.11.8

MDL-74701 core: Fix popover elements are focusable even when hidden


commit 46ee4f4062f81aa4cf3876a3d68f4e7328b07dd3
Author: Huong Nguyen <huongnv13@gmail.com>
Date:   Fri, 06 May 2022 13:21:39 +0800
Tag:    v3.11.8

MDL-72029 Lesson: Prevent arbitrary file read when importing lesson questions in blackboard format


commit edc7eb06b7938f6fefe69d43dfc4cf89705f669f
Author: Huong Nguyen <huongnv13@gmail.com>
Date:   Fri, 06 May 2022 12:30:15 +0800
Tag:    v3.11.8

MDL-72029 lib: Prevent path traversal for clean_param with PARAM_SAFEPATH