Convenience method for showing an error dialog.

def show_error_dialog(message: str, details: str=None):
        """
        Convenience method for showing an error dialog.
        """
        # TODO: i18n
        message_box = QMessageBox(
            QMessageBox.Critical,
            "Error",
            message,
            QMessageBox.Ok,
            None
        )
        if details:
            message_box.setDetailedText(details)
        message_box.exec_()