Author: David Mudrák
MDL-49329 admin: Improve the UI for installing dependencies
http://git.moodle.org/gw?p=moodle.git;a=commit;h=9137a89a1a566812e3b8278385b41f5c314e44eb
http://github.com/moodle/moodle/commit/9137a89a1a566812e3b8278385b41f5c314e44eb
+ 3.0 en [dependencyinstallmissing,core_plugin]