Resolve "Fonctionnalité : plusieurs paramètres qui varient (Voir Jalhyd#62)"

Closes #126 (closed)

src/app/components/dialog-edit-param-values/dialog-edit-param-values.component.html

@@ -105,6 +105,15 @@
         </form>
     </div>
 
+    <mat-form-field>
+      <mat-select [placeholder]="uitextExtensionStrategy" [(value)]="selectedExtensionStrategy"
+        data-testid="variable-extension-strategy-select">
+          <mat-option *ngFor="let e of extensionStrategies" [value]="e.value">
+              {{ e.label }}
+          </mat-option>
+      </mat-select>
+    </mat-form-field>
+
   </div>
 
   <div mat-dialog-content *ngIf="viewChart">