Added ngIf to Filtered By row.

Author: DeborahK

APM - Final/app/products/product-list.component.html

@@ -11,7 +11,7 @@
                 <input type='text' [(ngModel)]='listFilter' />
             </div>
         </div>
-        <div class='row'>
+        <div class='row' *ngIf='listFilter'>
             <div class='col-md-6'>
                 <h3>Filtered by: {{listFilter}} </h3>
             </div>