title: Cdk virtual-scroll inside mat-select for mat-option
body: <p>Has anyone been able to use virtual-scroll inside mat-select  as shown below ?</p>
  <pre class="lang-html prettyprint-override"><code>&lt;mat-form-field&gt;
      &lt;mat-select placeholder=&quot;State&quot;&gt;
          &lt;cdk-virtual-scroll-viewport autosize&gt;
              &lt;mat-option *cdkVirtualFor=&quot;let state of states&quot; [value]=&quot;state&quot;&gt;{{state}}&lt;/mat-option&gt;
          &lt;/cdk-virtual-scroll-viewport&gt;
      &lt;/mat-select&gt;
  &lt;/mat-form-field&gt;
  </code></pre>
  <p>As you can see <a href="https://stackblitz.com/edit/angular-h4xptu?file=app%2Fselect-reset-example.html" rel="nofollow noreferrer">https://stackblitz.com/edit/angular-h4xptu?file=app%2Fselect-reset-example.html</a> it does not work - causes weird blank space as you scroll.</p>