Performs a quick refresh of the contents of all connected controls.
Use the SmartRefresh to update the contents of a JamShellList. In comparison to the TJamShellLink.FullRefresh method, SmartRefresh is much faster, but only removes objects which have been deleted and adds objects which have been added. It doesn't update changed file sizes or dates. Usually this method will be called automatically, when a file was added or deleted.
