Author: Ferran Recio
MDL-73336 theme_boost: fix drawer tooltips
http://git.moodle.org/gw?p=moodle.git;a=commit;h=ea012661183235efc617d0d012262f06cd57a158
http://github.com/moodle/moodle/commit/ea012661183235efc617d0d012262f06cd57a158
+ 4.0 en [closeblockdrawer,core]
+ 4.0 en [closecourseindex,core]
+ 4.0 en [opendrawerindex,core]