* Show the total size of files in the statusbar (thanks to Bram Schoenmakers for the patch).
* Changed the format of the string to be consistent with the format used when doing a selection. Maybe it would be useful adjusting KIO::itemsSummaryString() instead using a custom output format. Currently KIO::itemsSummaryString() shows "20 Items (5 Files, 15 Folders) - (200 KiB Total)", which is quite confusing IMO, as the total size is only counted for the files. Dolphin currently shows: "15 Folders, 5 Files (200 KiB)"