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We might want to present the process list in several different views. The process list is quite expensive, so if we ref-count the core we can use it in multiple places. Timers remain in their respecitive views as Processes has it's own internal throttling mechanism. Because that leaves us with a ref-counting issue on which plugin attributes are enabled or not, that is changed to be implicit based on whether we have dataChanged connected or not; which actually simplifies some code. Co-authored-by: David Redondo <kde@david-redondo.de>
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