Fills listview with existing data products

def fillDataProducts(self, dps):
        """Fills listview with existing data products"""
        item = None
        for dp in dps:
            if not dp.ignored:
                item = self._makeDPItem(self, dp, item)
                # ensure combobox widgets are made
                self._itemComboBox(item, self.ColAction)
                self._itemComboBox(item, self.ColRender)