Whether to use the system threadpool to obtain information on listview items.
If this property is false (the default value), the complete file detail information is retrieved as
soon as the item is displayed the first time within the listview.
Sometimes it is useful to have all file information fetched as soon as possible without loosing userinterface
responsiveness. If set to true, the item information for all files in the listview is additionally
fetched from the background this further enhances performance on multicore systems.