Move to the next status in the timeline.

def select_next(self):
        """Move to the next status in the timeline."""
        self.footer.clear_message()

        old_index = self.selected
        new_index = self.selected + 1

        # Load more statuses if no more are available
        if self.selected + 1 >= len(self.statuses):
            self.fetch_next()
            self.left.draw_statuses(self.statuses, self.selected, new_index - 1)
            self.draw_footer_status()

        self.selected = new_index
        self.redraw_after_selection_change(old_index, new_index)