Operator Change Fun

Operator Change Fun

Allow for temporary, staff, and permanent operator changes.

Temporary uses a temp authtoken for a few minute timeout.

Staff uses a normal staff login authtoken for a multi-hour timeout.

Permanent is a staff change that disregards the previous login instead of
allowing it to be recovered by using the menu item again.

I also fixed things up so later timeouts can re-use the previous duration
and fixed up some title bar issues:

1 - Login screen shows version again (needed a document in the title set)
2 - Menu windows don't forget the server name
3 - Menu windows keep the same number for their lifetime

Signed-off-by: Thomas Berezansky <tsbere@mvlc.org>
Signed-off-by: Bill Erickson <berick@esilibrary.com>