title: Is it possible to enable or disable a tab in Ionic3?
body: <p>Is it possible to enable and disable a tab in Ionic3 application?</p>
  <p>I try to use *ngIf to do that in html, but each time when setting is changed from false to true, an new tab is added; when setting is changed from true to false, the tab doesn't disappear.</p>
  <p>html is:</p>
  <pre><code>&lt;ion-tabs&gt;
    &lt;ion-tab [root]=&quot;tab0Root&quot; [tabTitle]=&quot;tab0Title&quot; tabIcon=&quot;home&quot;&gt;&lt;/ion-tab&gt;
    &lt;ion-tab [root]=&quot;tab1Root&quot; [tabTitle]=&quot;tab1Title&quot; tabIcon=&quot;people&quot;&gt;&lt;/ion-tab&gt;
    &lt;ion-tab *ngIf=&quot;setting==true&quot; [root]=&quot;tab2Root&quot; [tabTitle]=&quot;tab2Title&quot; tabIcon=&quot;setting&quot;&gt;&lt;/ion-tab&gt;
  &lt;/ion-tabs&gt;
  </code></pre>
  <p>Thanks.</p>