add auto-filling preferences

The auto-filling function of the Edit window is useful
with some fields, but annoying with others. It makes
great sense with Author, Journal and Keywords fields,
because they get repeated a lot. On the contrary, the
Title field almost never repeats in my field, which is
physics. The auto-fill keeps on offering me another
article title, which begins with the same word and
usually I have to fiddle with delete and escape, where
straight writing would be simplier.

Therefore, I would greatly welcome an option to turn
the auto-fill mechanism for selected fields off.
Thanks,
G4Danny