Steps to reproduce:
* Right click on a panel (a popup will appear);
* Click somewhere else, outside of the popup.

Expected results:
The popup disappears.

Actual results:
The popup stays alive even if I click on the panel. The only way to dismiss it is to click on some entry in the popup.

---

Maybe, https://phabricator.kde.org/source/kwin/browse/master/popup_input_filter.cpp$62-75 should be instead

    if (!m_popupClients.contains(pointerFocus)) {
        cancelPopups();
        return true;
    }

Not sure why there are such specific rules (e.g. clicking on decoration dismisses popups).