Prevent QEventLoopLocker closing kded unexpectedly
KJobs use QEventLoopLocker under the hood. When a job is destroyed, the event loop locker will be destroyed and the QGuiApplication object will be unref'ed. Since isQuickLockEnabled() is true by default, kded will close, which is not what we want.
To prevent that, set isQuickLockEnabled() to false.
See also plasma/powerdevil!139 (merged)