patch Array.filter() for IE8
patch Array.filter() for IE8

total-impact/total-impact-webapp,Impactstory/total-impact-webapp,Impactstory/total-impact-webapp,Impactstory/total-impact-webapp,total-impact/total-impact-webapp,total-impact/total-impact-webapp,total-impact/total-impact-webapp,Impactstory/total-impact-webapp