def addSeparator(self):
        item = self.addItem('', None, None)
        item.setSeparator(True)
        return item
Generates screen to be able to load ESGF observation file.
dataset/ETHPy150Open rwl/muntjac/muntjac/ui/menu_bar.py/MenuItem.addSeparator--crossover with--dataset/ETHPy150Open apache/climate/RCMES/cli_app.py/load_esgf_obs_screen