add_course_data_columns()
Function: Adds the assigned course columns for lessons and quizzes in the admin.
Function: Adds the assigned course columns for lessons and quizzes in the admin.
Method: When the post is saved, save the data in the Groups custom metabox
Method: Displays users course information at bottom of profile called by show_user_profile().
Method: Output link to delete course data for user
Filter Hook: Filters whether to disable advanced quiz or not.