QML viewer window size does not update when loading new QML app

This was observed running Qt Declarative compiled from qt/qt-qml branch under Linux.

Not much of an issue, but still;
Load a QML application into the QML viewer, then load (File -> Open...) another application with
a differently sized root element without restarting the viewer. The QML viewer window stay the
size of the initially loaded app's root element.