title: Customize kendo panelbar item header
body: <p>I have the following panelbar:</p>
  
  <pre><code>     &lt;kendo-panelbar *ngIf="mainMenu" 
          [expandMode]="expandMode"&gt;
          &lt;kendo-panelbar-item [title]="menuItem.title" *ngFor="let menuItem of mainMenu" iconClass="fa fa-lg {{menuItem.faIcon}}"
            [routerLink]="menuItem.link" routerLinkActive="active"&gt;
              &lt;kendo-panelbar-item [title]="menuItemSub.title" *ngFor="let menuItemSub of menuItem.sub" 
              [routerLink]="menuItemSub.link" routerLinkActive="active"&gt;
              &lt;/kendo-panelbar-item&gt;
          &lt;/kendo-panelbar-item&gt;
        &lt;/kendo-panelbar&gt;
  </code></pre>
  
  <p>An example of the generated item is like this:</p>
  
  <pre><code>    &lt;kendo-panelbar-item routerlinkactive="active" tabindex="0" ng-reflect-router-link="/dashboard-edge" 
  ng-reflect-router-link-active="active" ng-reflect-title="Dashboard Edge" 
  ng-reflect-icon-class="fa fa-lg fa-window-maximize" role="treeitem" 
  class="k-item k-state-default " id="k-panelbar-item-default-1" aria-selected="false"&gt;
      &lt;span class="k-link k-header"&gt;
          &lt;!--bindings={"ng-reflect-ng-if": "fa fa-lg fa-window-maximize"}--&gt;
          &lt;span class="k-icon fa fa-lg fa-window-maximize" ng-reflect-klass="k-icon" 
          ng-reflect-ng-class="[object Object]"&gt;
          &lt;/span&gt;
          &lt;!--bindings={"ng-reflect-ng-if": ""}--&gt;
          Dashboard Edge
          &lt;!--bindings={}--&gt;
          &lt;!--bindings={"ng-reflect-ng-if": "false"}--&gt;
      &lt;/span&gt;
  &lt;!--bindings={"ng-reflect-ng-if": "false"}--&gt;
  &lt;/kendo-panelbar-item&gt;
  </code></pre>
  
  <p>How can I customize the content of the item (with HTML) so that I can get more control of how the information is displayed? For instance, I would like to have the title wrapped in a <code>&lt;span&gt;</code> tag with some specific class.</p>
  
  <p>I'm able to customize the content using templates, but not the header itself.</p>