title: primeng text editor icon and label is not displaying
body: <p>I don't see the icons of the buttons within the primeng Text Editor that I use in the Angular project.
  <a href="https://i.stack.imgur.com/DtGZF.png" rel="nofollow noreferrer">enter image description here</a></p>
  
  <p>I added to the module: <code>import { EditorModule } from 'primeng/editor';</code></p>
  
  <p>in HTML below:    </p>
  
  <pre><code>&lt;p-editor class="fa fa-xxx"  [(ngModel)]="text1" [style]="{'height':'320px'}"&gt;&lt;/p-editor&gt;
                  &lt;p&gt;Value: {{text1||'empty'}}&lt;/p&gt;
  
                  &lt;button pButton type="button" label="Clear" icon="fa-close" (click)="text1=null"&gt;&lt;/button&gt;
  
                  &lt;hr style="border-top:0px;border-color:#dde3e6"&gt;
  </code></pre>