Timewindow: fix updating group interval and making form dirty when NONE aggregation selected

ui-ngx/src/app/shared/components/time/timewindow-panel.component.html

@@ -141,8 +141,8 @@
         </section>
       </ng-container>
 
-      <section class="tb-form-row column-xs same-padding" [class.!hidden]="!(isEdit || !timewindow.hideAggInterval)
+      <section class="tb-form-row column-xs same-padding" *ngIf="timewindowForm.get('aggregation.type').value !== aggregationTypes.NONE"
-                 || timewindowForm.get('aggregation.type').value === aggregationTypes.NONE">
+               [class.!hidden]="!(isEdit || !timewindow.hideAggInterval)">
         <ng-container formGroupName="realtime" *ngIf="timewindowForm.get('selectedTab').value === timewindowTypes.REALTIME">
           <tb-timeinterval
             formControlName="interval"