Issue with new save-as dialog for postgres

[Scott Peshak]

> OK.  I found the problem.  The dbi is specifying port 0.  The default for
> postgres is 5432, so I can easily change it to that.  For a non-default
> installation, I'm not sure how the user should specify the port.
>

I vote for allowing :<portnum> in the host field. (and assume 5432 if
it is omitted)  I would think that using a non-default port would be
rare enough that it would be best not to clutter the dialog with
another field.

-Scott