Display the left sidebar in the Curses interface.

def __display_left(self, stat_display):
        """Display the left sidebar in the Curses interface."""
        self.init_column()

        if self.args.disable_left_sidebar:
            return

        for s in self._left_sidebar:
            if ((hasattr(self.args, 'enable_' + s) or
                 hasattr(self.args, 'disable_' + s)) and s in stat_display):
                self.new_line()
                self.display_plugin(stat_display[s])