Revert "Removed last active item list number from el.cfg file, instead store in the item list file."

This reverts commit 50ca2cb73f77a419d6ac2e95889542fd4641f1b7.

Nothing wrong with this code except it make the file not compatible with
previous clients.  If you run a previous client, you loose your items
lists file.  I've added code to prevent that now but it would be too
late.  Ah well, perhaps another time....