message: fix(demo): fix progressbar demo page autoscroll top
diff: -<ng-container *ngIf="componentContentBs3 || componentContentBs4">
  -
  <demo-section [name]="name" [src]="src" [componentContent]="isBs3 ? componentContentBs3 : componentContentBs4">
  <p>Provide up-to-date feedback on the progress of a workflow or action with simple yet flexible progress bars.</p>
  <docs-section *ngIf="isBs3" [content]="componentContentBs3"></docs-section>
  <docs-section *ngIf="!isBs3" [content]="componentContentBs4"></docs-section>
  </demo-section>
  -</ng-container>
  