Author: Mathew May
MDL-71963 Core: Add toast for confirmation modal success
http://git.moodle.org/gw?p=moodle.git;a=commit;h=6dcb5eb8a576d2d4939e87d9142be5a2192a2334
http://github.com/moodle/moodle/commit/6dcb5eb8a576d2d4939e87d9142be5a2192a2334
+ 4.0 en [deleteblockinprogress,core_block]