Reimplementation of show to update all currently available JB_MainWindows

        :returns: None
        :rtype: None
        :raises: None

def show(self, ):
        """Reimplementation of show to update all currently available JB_MainWindows

        :returns: None
        :rtype: None
        :raises: None
        """
        wins = set(JB_MainWindow.instances())
        widgets = set(self.get_widgets())
        for w in wins - widgets:
            self.add_widget(w)
        super(JB_WindowToolTip, self).show()