Git commits in Moodle 3.7.0 by Nathan Nguyen

commit cebfb23fb1e922408b428353e00a1701580ef611
Author: Nathan Nguyen <nathannguyen@catalyst-au.net>
Date:   Fri, 15 Feb 2019 13:20:14 +0800
Tag:    v3.7.0-beta

MDL-63263 tool_recyclebin: Apply automated backup setting

commit 9432553b1ce8e09c26c59e5b6c0375ec64ddc028
Author: Nathan Nguyen <nathannguyen@catalyst-au.net>
Date:   Fri, 15 Feb 2019 12:15:22 +0800
Tag:    v3.7.0-beta

MDL-61537 assignfeedback_editpdf: Rotate PDF page