Ticket 144: allow the selection of a different user in dlgSelectConnection

Hi,

Josh asked some time ago to be able to change the user when adding a new
connection in the query tool. The dlgSelectConnection window already
allows this, but hides the txtUsername widget. I don't really understand
why it did this.

The patch attached changed the text widget with a combobox, and shows
this widget every time, so that a user can add a connection to a server
with a new user.

Comments?


--
Guillaume.
 http://www.postgresqlfr.org
 http://dalibo.com