Author: Paul Holden
MDL-75729 reportbuilder: improve handling of card toggle button.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=4bd6777cfbcc0f3995a2b483526a1275dec8d084
http://github.com/moodle/moodle/commit/4bd6777cfbcc0f3995a2b483526a1275dec8d084
+ 4.0 en [showhidecard,core_reportbuilder]