Chnage to one method to set MessageWidget text passing type as
parameter.
Only messages with questions requiring user input reamin using
MessageBox dialog.
Use signal/slots to set message in MessageWidget and hide message,
signal/slots only used when required.Maybe need to change all calls to
signals/slots in the future.
QMessageBox displays modal dialogs which blocks the gui tests.
To work around this we add a MessageBox wrapper class where
the tests can set the answer for the next dialog.
The answer is then returned without actually showing the dialog.
