Bibtex dialog in QT frontend

[Dekel Tsur]

Suppose that I have foo.bib in a place accessible by bibtex (e.g.
/home/dekel/bib).
In the bibtex dialog of the QT frontend, I cannot just write foo in order to
insert this database: I have to use the file dialog in order to navigate to
the /home/dekel/bib directory.
This is not just the inconvenience of the interface. Using the file dialog
results inserting of "/home/dekel/bib/foo" to the inset, which is not what I
want: just "foo".