Fills **Logging_Formatter_comboBox** Widget.

def __Logging_Formatters_comboBox_set_ui(self):
        """
        Fills **Logging_Formatter_comboBox** Widget.
        """

        self.Logging_Formatters_comboBox.clear()
        LOGGER.debug("> Available logging formatters: '{0}'.".format(", ".join(RuntimeGlobals.logging_formatters)))
        self.Logging_Formatters_comboBox.insertItems(0, QStringList(RuntimeGlobals.logging_formatters.keys()))
        logging_formatter = self.__settings.get_key("Settings", "logging_formatter").toString()
        self.__engine.logging_active_formatter = logging_formatter and logging_formatter or Constants.logging_default_formatter
        self.Logging_Formatters_comboBox.setCurrentIndex(self.Logging_Formatters_comboBox.findText(
            self.__engine.logging_active_formatter, Qt.MatchExactly))