QNX: Show line/column in the bar descriptor editor

Task-number: QTCREATORBUG-10395

Change-Id: I290c52dbcf2615513ec1a5fb0e724baff425d1cf
Reviewed-by: David Kaspar <dkaspar@blackberry.com>
Reviewed-by: Mehdi Fekari <mfekari@blackberry.com>
Reviewed-by: Nicolas Arnaud-Cormos <nicolas@kdab.com>