In order to reproduce:
 Open options dialogue.
 Chose “Load/Save > General”. Below option “Save AutoRecovery information every:” the option “Edit document properties ...” is displayed. Up to version 4.4.7 the option “ Automatically save the document too” is displayed below “Save AutoRecovery information every:”.
It's not a bug. It got removed because it never worked correctly.
See bug 65509
Not a bug then.
Thanks for the hint. I already had the suspicion, but I did not found the according bug report. Hence bug closed.