Fix System Tray popup interactivity after echanging item visiblity
Summary:
Avoid using plasmoid.rootItem in SystemTray's ConfigEntries.qml.
BUG: 393630
FIXED-IN: 5.14.6
Reviewers: Plasma, ngraham, broulik, davidedmundson, anthonyfieroni, fvogt
Reviewed By: Plasma, davidedmundson
Subscribers: plasma-devel
Tags: Plasma
Differential Revision: https://phabricator.kde.org/D18805