added a Yes/No question dialog

Change-Id: I5d27c0e367ebdc311aa259dc95ab50ef991a6413
Reviewed-by: Nicolas Arnaud-Cormos <nicolas@kdab.com>
Wrap UI editors as text editors

Reason for this is that the UI editor in text mode is read only

Change-Id: Ice4a83b8d932407c2bc8716c68cae39ee13a3899
Reviewed-by: Nicolas Arnaud-Cormos <nicolas@kdab.com>