Find-as-you-type improvements

- Add autocompleteEnabled input property for find-as-you-type
- Support escape and down arrow keys for hiding/showing FAYT results
- Add tests for find-as-you-type

Refs #737

ng2-components/ng2-alfresco-search/src/components/alfresco-search-control.component.ts

@@ -58,6 +58,9 @@ export class AlfrescoSearchControlComponent implements OnInit {
 
     @ViewChild('searchInput', {}) searchInput: ElementRef;
 
+    @Input()
+    autocompleteEnabled = true;
+
     @Input()
     autocompleteSearchTerm = '';
 
@@ -146,4 +149,12 @@ export class AlfrescoSearchControlComponent implements OnInit {
         }
     }
 
+    onEscape(): void {
+        this.searchActive = false;
+    }
+
+    onArrowDown(): void {
+        this.searchActive = true;
+    }
+
 }