fix(typeahead): removed incorrect behavior to do ENTER behavior on TA…

…B. TAB should simply skip to next field as expected.

fixes #686, fixes  #490, closes #689

components/typeahead/typeahead.directive.ts

@@ -135,17 +135,11 @@ export class TypeaheadDirective implements OnInit {
       return;
     }
 
-    // if shift + tab, close items list
-    if (e.shiftKey && e.keyCode === 9) {
+    // if tab default browser behavior will select next input field, and therefore we should close the items list
+    if (e.keyCode === 9) {
       this.hide();
       return;
     }
-
-    // if tab select current item
-    if (!e.shiftKey && e.keyCode === 9) {
-      this.container.selectActiveMatch();
-      return;
-    }
   }
 
   public constructor(cd:NgModel, viewContainerRef:ViewContainerRef, element:ElementRef,