title: How to always display a placeholder of ng-select?
body: <p>I am using ng-select in my Angular application and have quite an unusual use case. I need to always display the placeholder, even on option selected.
  With current code the placeholder is replaced with the value of selected option:</p>
  <pre class="lang-html prettyprint-override"><code>&lt;ng-select
    [(ngModel)]=&quot;selectedApplication&quot;
    class=&quot;application-switcher&quot;
    [attr.data-sel-id]=&quot;selId&quot;
    [clearable]=&quot;false&quot;
    appendTo=&quot;body&quot;
    [searchable]=&quot;false&quot;
    placeholder=&quot;{{ 'APP_TITLE' | translate }}&quot;
    [virtualScroll]=&quot;virtualScroll&quot;
    [markFirst]=&quot;false&quot;&gt;
      &lt;ng-option *ngFor=&quot;let application of applicationList&quot; [value]=&quot;application&quot;&gt;
        &lt;div&gt;
          {{ getApplicationName(application) }}
        &lt;/div&gt;
      &lt;/ng-option&gt;
  &lt;/ng-select&gt;
  </code></pre>