Add "..." to buttons which open a dialog

Change-Id: I70974a223b68b9823ac0f1346a9ecc504355955f
Reviewed-by: Rafael Roquetto <rafael.roquetto@kdab.com>
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@digia.com>
Reviewed-by: Eike Ziller <eike.ziller@digia.com>