KDE Bug: https://bugs.kde.org/show_bug.cgi?id=378042 5.8.7 LTS change list: https://www.kde.org/announcements/plasma-5.8.6-5.8.7-changelog.php "Backport 5.9/Master's GroupDialog code to 5.8. Commit. Fixes bug #378042. Phabricator Code review D5287"