fixed timestamp translations

ui-ngx/src/app/modules/home/components/widget/lib/timeseries-table-widget.component.html

@@ -47,7 +47,7 @@
             <table mat-table [dataSource]="source.timeseriesDatasource" [trackBy]="trackByRowTimestamp"
                        matSort [matSortActive]="source.pageLink.sortOrder.property" [matSortDirection]="source.pageLink.sortDirection()" matSortDisableClear>
               <ng-container *ngIf="showTimestamp" [matColumnDef]="'0'">
-                <mat-header-cell *matHeaderCellDef mat-sort-header>Timestamp</mat-header-cell>
+                <mat-header-cell *matHeaderCellDef mat-sort-header>{{ 'audit-log.timestamp' | translate }}</mat-header-cell>
                 <mat-cell *matCellDef="let row; let rowIndex = index"
                           [innerHTML]="cellContent(source, null, 0, row, row[0], rowIndex) | async"
                           [style]="cellStyle(source, null, 0, row, row[0], rowIndex) | async">

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

@@ -513,7 +513,7 @@ export class TimeseriesTableWidgetComponent extends PageComponent implements OnI
         let title = '';
         const header = this.sources[index].header.find(column => column.index.toString() === value);
         if (value === '0') {
-          title = 'Timestamp';
+          title = this.translate.instant('audit-log.timestamp');
         } else if (value === 'actions') {
           title = 'Actions';
         } else {