MOBILE-3401 course: Prevent JS errors when clearing option handlers
MOBILE-3401 course: Prevent JS errors when clearing option handlers

moodlehq/moodlemobile2,reskit/moodlemobile,reskit/moodlemobile,moodlehq/moodlemobile2,reskit/moodlemobile,reskit/moodlemobile,moodlehq/moodlemobile2,moodlehq/moodlemobile2,moodlehq/moodlemobile2,reskit/moodlemobile,moodlehq/moodlemobile2,reskit/moodlemobile