Wizards should be able to add Qt modules to a build

It produces the dialog.h which includes

#include <QDialog>

this doesn't compile. When I change it to:

#include <QtWidgets/QDialog>

then it complains in other place:

../untitled5/dialog.cpp:2:23: fatal error: ui_dialog.h: No such file or directory

(dialog.cpp has: #include "ui_dialog.h")

Edit: This is because QtWidgets is not added as a module to the project.