message: Fix the image viewer which was completely broken.
  closes
diff: @@ -86,7 +86,7 @@ export class ImageViewer extends ViewerElement {
  connectedCallback(): void {
  super.connectedCallback();
  - if (DomUtils.getShadowRoot(this) != null) {
  + if (DomUtils.getShadowRoot(this) == null) {
  const shadow = this.attachShadow({ mode: 'open', delegatesFocus: false });
  const clone = this.createClone();
  shadow.appendChild(clone);
  