applets/kicker: Adapt to narrowing types of QML methods in Task Manager applet
A perfectly avoidable screw-up, if only we used some kind of proxy object with natively invokable from C++ methods...
Requires plasma-desktop!2437 (closed) for the org.kde.plasma.filemanagement part of it.
Test plan
Open Application Launcher (Kickoff), right click on any app icon. Try "Add to Desktop", and "Pin to Task Manager" menu items.
Bugs fixed
plasmashell: QMetaObject::invokeMethod: No such method PlasmoidItem_QML_444::hasLauncher(QVariant)
Candidates are:
hasLauncher(QUrl)
plasmashell: QMetaObject::invokeMethod: No such method ContainmentItem_QML_63::addLauncher(QVariant)
Candidates are:
addLauncher(QUrl)