QDeclarativeTextInput does not repaint when passwordCharacter is changed

When changing the passwordCharacter of a TextItem element item is not redrawn until something else changes.

I could see that QDeclarativeTextInput::setPasswordCharacter() does not call update() or q_textChanged(), which might be better.

To reproduce, run the attached example and click the blue rectangle. Password chars do not change until you actually click them and type something.