Q_PROPERTY autocomplete should add pointer initialization

If I'm writing a property with a pointer type, like this

    Q_PROPERTY(QWindow* window READ window WRITE setWindow NOTIFY windowChanged)

it should generate the storage variable like this

private:
    QWindow *m_window = nullptr;

Currently it's leaving it unintialized, so if I modify the setter to undo something with the previous one (like disconnecting signals or whatever), boom... it's a random dangling pointer.