https://codepen.io/esausilva/pen/NYObRr (sinbi 백업링크) https://stackoverflow.com/questions/40290096/moving-items-between-two-lists-in-javascript https://stackoverflow.com/questions/50873082/move-items-across-between-multiple-select
마르스컴퍼니 님 (22108) https://sir.kr/qa/479171
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