title: ng-select : add an extra option
body: <p>How can I add an extra item to my ng-select dropdown like the <code>Create New in the following image</code> :</p>
  
  <p><a href="https://i.stack.imgur.com/WbMeD.png" rel="noreferrer"><img src="https://i.stack.imgur.com/WbMeD.png" alt="enter image description here"></a></p>
  
  <p>This is the current code I have:</p>
  
  <pre class="lang-html prettyprint-override"><code>&lt;ng-select
      [multiple]="true"
      [hideSelected]="true"
      [items]="robots"
      formControlName="RobotGUID"
      bindLabel="Name"
      bindValue="GUID"
  &gt;
      &lt;ng-template ng-label-tmp let-item="item" let-clear="clear"&gt;
          &lt;ng-container *ngIf="item.GUID"&gt;
              &lt;span class="ng-value-icon left" (click)="onRobotEditClick($event, item.GUID)" aria-hidden="true"&gt;
                  &lt;i class="fas fa-edit btn-focus"&gt;&lt;/i&gt;
              &lt;/span&gt;
              &lt;span class="ng-value-label"&gt;{{item.Name}}&lt;/span&gt;
              &lt;span class="ng-value-icon right" (click)="clear(item)" aria-hidden="true"&gt;×&lt;/span&gt;
          &lt;/ng-container&gt;
      &lt;/ng-template&gt;
  &lt;/ng-select&gt;
  </code></pre>
  
  <p>I tried using <code>&lt;ng-option&gt;</code> but the item didn't appear in the dropdown.
  How can I add an extra item form the template?</p>