After a file operation, reload relevant parent folders directly instead

of reloading the provided view (view not provided e.g. on DnD or DBus
event) - Only reload folders manually if no folder monitor is running to
prevent double-reloads. (should save some performance) - This will
reload the view correctly even if the location does not support folder
monitors - It as well fixes a Bug #15704 - Ghost files remain after
moving files on a sftp remote