MDL-38214 question - Add MCO, MCVS, MCHS Cloze subquestion types
MDL-38214 question - Add MCO, MCVS, MCHS Cloze subquestion types

add shuffling display in decode and verify
MDL-38214 question - Add MCO, MCVS, MCHS Cloze subquestion types

Add qtype_multianswer_initialise_multichoice_subquestion