message: fix: crash in deactivate page router outlet
diff: @@ -203,7 +203,7 @@ export class PageRouterOutlet implements OnDestroy { // tslint:disable-line:dire
  }
  deactivate(): void {
  - if (!this.outlet.isPageNavigationBack) {
  + if (!this.outlet || !this.outlet.isPageNavigationBack) {
  if (isLogEnabled()) {
  log("Currently not in page back navigation - component should be detached instead of deactivated.");
  }
  