expandable/collapsable group/frame
It is possible to improve the current design and also add an animation: https://stackoverflow.com/questions/32476006/how-to-make-an-expandable-collapsable-section-widget-in-qt
WSL/SLF GitLab Repository
It is possible to improve the current design and also add an animation: https://stackoverflow.com/questions/32476006/how-to-make-an-expandable-collapsable-section-widget-in-qt