QListWidget: User cannot reduce the size below certain limit

I described it in topic on forum

https://forum.qt.io/topic/130659/cannot-get-small-size-of-qlistwidget

Unlike most of widgets you cannot resize it below certain limit (>only allows 73 as minimum)

I'm creating a widget in QMdiArea and it would be great if user could resize it any way he wants (e.g. in this situation to visually 'collapse' QListWidget and drag window border to open it when he needs.