QML imports are currently not all consistent.
We should use this example as a base (versions can of course be different, only use needed imports) and apply it everywhere:
import QtQuick 2.12 import QtQuick.Controls 2.12 as QQC2 import QtQuick.Dialogs 1.3 as QtDialogs import QtQuick.Layouts 1.12 import org.kde.kirigami 2.10 as Kirigami import org.kde.plasma.components 2.0 as PlasmaComponents2 import org.kde.plasma.components 3.0 as PlasmaComponents3 import org.kde.plasma.core 2.0 as PlasmaCore import org.kde.plasma.extras 2.0 as PlasmaExtras