Customwizard: Fix compile error with Qt5.1

Change-Id: Iecb492bdee16413db935550fd16923d2067adfd7
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
PathChooser: Provide more direct access to button label

Change-Id: I1489f40432acd3b70cedac6aded40738dddca941
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Reviewed-by: Eike Ziller <eike.ziller@digia.com>