Sadler's Wells, LondonThe choreographer squares up to our political anxieties " and his own demons " with grace and the defiant spirit of the band who played on the TitanicGrand Finale is as apocalyptic a work as Hofesh Shechter has ever made. Squaring up to the precariousness of our world, the political and ecological disasters we've created for ourselves, it's a work fraught with violence, dread and a manic kind of…