After a bug fix in Qt 5.14 we now get real close events for unclosed windows when
the application closes, so we would be getting two close events breaking our
logic when when to suppress on-close dialogs.
We've moved to GitLab; would you mind re-submitting this as a merge request over at https://invent.kde.org/frameworks/kxmlgui/-/merge_requests/?
Relevant documentation is at https://community.kde.org/Infrastructure/GitLab.