[Qt-creator] Strange problem with code completion

[Jean-Baptiste Rouault]

I'm using a QComboBox in my code and there is a strange bug with code 
completion.
I included <QComboBox> and completion doesn't work at all for QComboBox
(completion of the class name or after ->)
Including <QtGui> solves the problem but it's strange and it doesn't happen 
with other classes I'm using in my project.

Regards,
Jean-Baptiste