message: Close welcome banner when launching beginner tutorial
diff: @@ -38,6 +38,7 @@ export class WelcomeBannerComponent implements OnInit {
  }
  startHackingInstructor () {
  + this.dialogRef.close()
  console.log('Starting instructions for challenge "Score Board"')
  import(/* webpackChunkName: "tutorial" */ '../../hacking-instructor').then(module => {
  module.startHackingInstructorFor('Score Board')
  