fix chart export for pdf / in chrome
fix chart export for pdf / in chrome

standino/saiku,witcxc/saiku,wtstengshen/saiku,bisone/saiku,wtstengshen/saiku,standino/saiku,pstoellberger/saiku-ui,witcxc/saiku,wtstengshen/saiku,dasbh/saiku,dasbh/saiku,zegang/saiku,customme/saiku,devgateway/ccrs-saiku,wtstengshen/saiku,dasbh/saiku,zegang/saiku,pstoellberger/saiku-ui,qqming113/saiku,OSBI/saiku,NAUMEN-GP/saiku,wwf830527/saiku,customme/saiku,wwf830527/saiku,devgateway/ccrs-saiku,devgateway/ccrs-saiku,hengyuan/saiku,wtstengshen/saiku,hengyuan/saiku,hengyuan/saiku,brenopolanski/saiku-ui,devgateway/ccrs-saiku,customme/saiku,NAUMEN-GP/saiku,wtstengshen/saiku,qixiaobo/saiku-self,zegang/saiku,zegang/saiku,devgateway/ccrs-saiku,qixiaobo/saiku-self,OSBI/saiku-ui,wwf830527/saiku,bisone/saiku,standino/saiku,NAUMEN-GP/saiku,dasbh/saiku,zegang/saiku,bisone/saiku,newenter/saiku,NAUMEN-GP/saiku,NAUMEN-GP/saiku,standino/saiku,customme/saiku,wwf830527/saiku,qqming113/saiku,standino/saiku,newenter/saiku,qixiaobo/saiku-self,OSBI/saiku,newenter/saiku,devgateway/ccrs-saiku,OSBI/saiku,bisone/saiku,qqming113/saiku,qixiaobo/saiku-self,hengyuan/saiku,zegang/saiku,OSBI/saiku-ui,newenter/saiku,dasbh/saiku,witcxc/saiku,bisone/saiku,standino/saiku,bisone/saiku,brenopolanski/saiku-ui,GermainSIGETY/sauceDallas-saiku3-ui,qqming113/saiku,OSBI/saiku,qqming113/saiku,wwf830527/saiku,qqming113/saiku,OSBI/saiku,dasbh/saiku