Author: Jason Fowler
MDL-35833 - Blocks - Adding alt and title attributes to the docked-block panel close button
http://git.moodle.org/gw?p=moodle.git;a=commit;h=7c7412b74e6cb5b36a6ee38afa9a4cfc0aca584f
http://github.com/moodle/moodle/commit/7c7412b74e6cb5b36a6ee38afa9a4cfc0aca584f
+ 2.2 en [hidedockpanel,core_block]
+ 2.2 en [hidepanel,core_block]