Git commits in Moodle 3.8.x by Ilya Tregubov

commit 37d7820816fa96edd4f5738064b3f3bb930bda99
Author: Ilya Tregubov <ilyatregubov@catalyst-au.net>
Date:   Tue, 24 Mar 2020 06:36:57 +0800
Tag:    v3.8.4

MDL-68203 restore: Decode quiz links when restore into existing course

commit 64ce596f8c0561cbe365b770058c8f7dbe49d2f8
Author: Ilya Tregubov <ilyatregubov@catalyst-au.net>
Date:   Mon, 17 Jun 2019 13:37:32 +0800
Tag:    v3.8.0-beta

MDL-65925 assign: Grade page broken if submission was deleted.

commit 4120908e1900d81a579ff58ce138aff42931f3f4
Author: Ilya Tregubov <ilyatregubov@catalyst-au.net>
Date:   Wed, 03 Apr 2019 13:47:52 +0800
Tag:    v3.8.0-beta

MDL-65249 Session: Throw exception if number of attempts exceeded.