Fix the blur not appearing properly in non-webkits.
Fix the blur not appearing properly in non-webkits.

GerHobbelt/nprogress,baiyanghese/nprogress,elgubenis/nprogress,AladdinSonni/nprogress,Klaudit/nprogress,owyowoo/nprogress,Keystion/nprogress,haner199401/nprogress,vanloswang/nprogress,cchamberlain/nprogress,Kumarsammy/nprogress,Paveltarno/nprogress,mcanthony/nprogress,AladdinSonni/nprogress,GerHobbelt/nprogress,rstacruz/nprogress,Cyclone77/nprogress,ipernet/nprogress,asonni/nprogress,GerHobbelt/nprogress,lisitang/nprogress,mcanthony/nprogress,rockmandew/nprogress,Klaudit/nprogress,Boelensman1/nprogress,phpbits/nprogress,owyowoo/nprogress,phpbits/nprogress,baiyanghese/nprogress,cxhan/nprogress,Cyclone77/nprogress,lisitang/nprogress,rstacruz/nprogress,cchamberlain/nprogress,aoimedia/nprogress,leolujuyi/nprogress,npmcomponent/rstacruz-nprogress,Paveltarno/nprogress,loki315zx/nprogress,elgubenis/nprogress,loki315zx/nprogress,vanloswang/nprogress,rockmandew/nprogress,Kumarsammy/nprogress,aoimedia/nprogress,Boelensman1/nprogress,cxhan/nprogress,asonni/nprogress,haner199401/nprogress,leolujuyi/nprogress