title: Disable specific item from ngx-editor
body: <p>I'm trying to disable a specific item from a ngx-editor but it does not work...</p>
  
  <p>here is my actual code:</p>
  
  <pre><code>&lt;app-ngx-editor [placeholder]="'Enter text here...'"
                       [enableToolbar]="true" [editable]="false"
                       [spellcheck]="true" [(ngModel)]="htmlContent"&gt;&lt;/app-ngx-editor&gt;
  </code></pre>
  
  <p>When I set "editable"="false", all item of toolbar are disabled... How can I disable only the "video" buttom?</p>