Fix graph on not-Chrome (rancher/rancher#4236)
Fix graph on not-Chrome (rancher/rancher#4236)

vincent99/ui,vincent99/ui,rancherio/ui,pengjiang80/ui,rancherio/ui,rancher/ui,westlywright/ui,lvuch/ui,westlywright/ui,vincent99/ui,westlywright/ui,pengjiang80/ui,nrvale0/ui,lvuch/ui,pengjiang80/ui,lvuch/ui,rancherio/ui,rancher/ui,nrvale0/ui,rancher/ui,nrvale0/ui