如何在OLD控制台上的新创建的功能应用程序按钮中添加外部图标？

Not able to use external icon to my newly created featured application button on OKD web console.

The new button for My Application did show but the icon didn't showed.

This is my extension javascript:

window.OPENSHIFT_CONSTANTS.SAAS_OFFERINGS = [{
  title: "My Application",                         
  iconClass: "icon-myicon",                     
  url: "https://www.my.app.site.com",         
  description: "My application"  
}

This is my extension css:

.icon-myicon {
   background-image: url(https://192.168.99.1:8080/myicon.png);
   width: 50px;
   height: 50px;
}

Then I updated the extension scriptURLs and stylesheetURLs to point to the js and css script above using oc edit openshiftwebconsoleconfigs.webconsole.operator.openshift.io

But the myicon never show up.

I would like to see myicon on the OKD webconsole.