The source project of this merge request has been removed.
Fix for #481007: kwin tabbox caching issue: use m_qmlContext.trimComponentCache()(edit)
TabBox QMLEngine holds cached version of faulty WindowSwitcher.qml file even though the file is changed on disk.
This change ensures that in case the WindowSwitcher.qml fails to load, that the faulty QML file is no longer cached by QMLEngine
See https://bugs.kde.org/show_bug.cgi?id=481007 for more info