Feature-9518: Scale-in/Scale-out commands triggered from the UI

 * In NS Instances page. Click "Manual Scaling" in the actions menu.
 * Then a new pop-up page will opened.
 * In the popup there will be a list box which is filled with the all scaling-group-descriptor names captured from all VNFDs in the NSD and whoose scaling-type is "manual".
 * Select scale in / scale out.
 * When the scaling-group-descriptor name and the scaling direction are selected then Click Apply button.
 * The pop-up window is closed and the page is directed to "History of operations" page for this NS.

Change-Id: Iaaa1500bcabea4ebda89f6c11ea91b28396aa42f
Signed-off-by: Barath Kumar R <barath.r@tataelxsi.co.in>
diff --git a/src/app/utilities/ns-instances-action/NSInstancesActionComponent.html b/src/app/utilities/ns-instances-action/NSInstancesActionComponent.html
index 823d99f..977a87e 100644
--- a/src/app/utilities/ns-instances-action/NSInstancesActionComponent.html
+++ b/src/app/utilities/ns-instances-action/NSInstancesActionComponent.html
@@ -36,6 +36,10 @@
             <button type="button" class="btn btn-primary dropdown-item" (click)="execNSPrimitiveModal()" placement="left" container="body" ngbTooltip="{{'EXECPRIMITIVE' | translate}}" [disabled]="operationalStatus == 'failed' || configStatus == 'failed'">
                 <i class="fas fa-magic"></i> {{'EXECPRIMITIVE' | translate}}
             </button>
+            <button type="button" class="btn btn-primary dropdown-item" [disabled]="operationalStatus === 'scaling'" (click)="manualScaling()"
+                placement="left" data-container="body" ngbTooltip="{{'SCALING' | translate}}">
+                <i class="fas fa-cubes"></i> {{'SCALING' | translate}}
+            </button>
             <button type="button" class="btn btn-primary dropdown-item" (click)="historyOfOperations()" placement="left" container="body" ngbTooltip="{{'HISTORYOFOPERATIONS' | translate}}">
                 <i class="fas fa-history"></i> {{'HISTORYOFOPERATIONS' | translate}}
             </button>
@@ -45,4 +49,4 @@
         </div>
     </div>
 </div>
-<app-loader [waitingMessage]="message" *ngIf="isLoadingMetricsResult"></app-loader>
\ No newline at end of file
+<app-loader [waitingMessage]="message" *ngIf="isLoadingNSInstanceAction"></app-loader>
\ No newline at end of file