Fix warning
Summary: .../share/plasma/shells/org.kde.plasma.desktop/contents/applet/AppletError.qml:33:5: QML IconItem: Detected anchors on an item that is managed by a layout. This is undefined behavior; use Layout.alignment instead.
Reviewers: Plasma, davidedmundson
Reviewed By: Plasma, davidedmundson
Subscribers: plasma-devel
Tags: Plasma
Differential Revision: https://phabricator.kde.org/D13523