Fix pagination on alarm table widget after timewindow updated

ui-ngx/src/app/modules/home/components/widget/lib/alarms-table-widget.component.ts

@@ -48,7 +48,7 @@ import cssjs from '@core/css/css';
 import { sortItems } from '@shared/models/page/page-link';
 import { Direction } from '@shared/models/page/sort-order';
 import { CollectionViewer, DataSource, SelectionModel } from '@angular/cdk/collections';
-import { BehaviorSubject, forkJoin, fromEvent, merge, Observable } from 'rxjs';
+import { BehaviorSubject, forkJoin, fromEvent, merge, Observable, Subscription } from 'rxjs';
 import { emptyPageData, PageData } from '@shared/models/page/page-data';
 import { entityTypeTranslations } from '@shared/models/entity-type.models';
 import { debounceTime, distinctUntilChanged, map, take, tap } from 'rxjs/operators';
@@ -188,6 +188,8 @@ export class AlarmsTableWidgetComponent extends PageComponent implements OnInit,
 
   private rowStylesInfo: RowStyleInfo;
 
+  private widgetTimewindowChangedSubscription: Subscription;
+
   private searchAction: WidgetAction = {
     name: 'action.search',
     show: true,
@@ -243,6 +245,17 @@ export class AlarmsTableWidgetComponent extends PageComponent implements OnInit,
     this.initializeConfig();
     this.updateAlarmSource();
     this.ctx.updateWidgetParams();
+
+    this.widgetTimewindowChangedSubscription = this.ctx.defaultSubscription.widgetTimewindowChanged.subscribe(
+      () => this.pageLink.page = 0
+    );
+  }
+
+  ngOnDestroy(): void {
+    if (this.widgetTimewindowChangedSubscription) {
+      this.widgetTimewindowChangedSubscription.unsubscribe();
+      this.widgetTimewindowChangedSubscription = null;
+    }
   }
 
   ngAfterViewInit(): void {