Git commits in Moodle 3.4.5 by sarjona

commit 5174d7ad7548760acff66a4da4bea46e020f421e
Author: sarjona <sara@moodle.com>
Date:   Mon, 30 Jul 2018 20:01:39 +0800
Tag:    v3.4.5

MDL-62800 tool_policy: Merge the policy tool to 3.4


commit 6e09d47fc55f48632b560e47a637998ad6412af9
Author: Sara Arjona <sara@moodle.com>
Date:   Fri, 20 Jul 2018 21:25:09 +0800
Tag:    v3.4.5

MDL-41847 core_user: Add preferred lang field to the user creation form


commit 396b60a4c25dee4bebbe99b8143daed7f63cfd67
Author: Sara Arjona <sara@moodle.com>
Date:   Tue, 17 Jul 2018 19:17:57 +0800
Tag:    v3.4.5

MDL-41847 core_user: Add lang to login URL email for new user accounts


commit 44bae9d93797b9d8113da93bb575f3028334776e
Author: sarjona <sara@moodle.com>
Date:   Tue, 10 Jul 2018 17:06:23 +0800
Tag:    v3.4.5

MDL-60924 core_user: Hold participant filters when clicking some link