Author: danghieu1407
MDL-76757 Question bank: Can not delete the question completely
http://git.moodle.org/gw?p=moodle.git;a=commit;h=cf0b6e06e273865d662b931d9cd3c5a21f99fadc
http://github.com/moodle/moodle/commit/cf0b6e06e273865d662b931d9cd3c5a21f99fadc
+ 4.1 en [deletequestioncheck,core_question]
+ 4.1 en [deletequestionscheck,core_question]
+ 4.1 en [deleteselectedquestioncheck,core_question]
+ 4.1 en [deletequestiontitle,core_question]
+ 4.1 en [deletequestiontitle_plural,core_question]
+ 4.1 en [deleteversiontitle,core_question]
+ 4.1 en [deleteversiontitle_plural,core_question]
+ 4.1 en [questionnameandquestionversion,core_question]
+ 4.1 en [questionsinuse,core_question]