Fixed a bug in which double screen transitions occurred when the enter key was pressed while the focus was on the next button.
If you are using sections, shuffle_questions:false is not allowed, mode:master is required, question_count is not allowed
Implemented the process when the license key is sent from learningBOX.
Prevent double screen transitions with the enter key by removing focus from the next button when moving to the next question.
Fixed a bug that extra tags are displayed on user's answers in case of button format in the result screen.
If there is more than one same hole in one question in the pull-down, it is an error.
Fixed a bug that the grabbing part on the right side of the sort question moves while dragging.
Suppressed the phenomenon that the width becomes too wide while moving in the reordering problem
Fixed a problem that the height of the right side option is unnecessarily high in combination questions.
Remove code containing invalid pseudo-class:valid in mdb
In a combinatorial problem, an error occurred when trying to get the height of an element that no longer exists, so the process was removed.