title: unable to add row details in Angular 5?
body: <p>Hi I am working on Angular 5 Project.  I am using ngx data table. I am trying to implement row detail functionality. I added ngx-datatable-row-detail and ngx-datatable-column. To expand row arrow symbol should come but In my case nothing is coming. Below is my code.</p>
  
  <pre><code>&lt;ngx-datatable class="material colored-header sm table-hover"
                     [loadingIndicator]="loadingIndicator"
                     [rows]="rows"
                     [rowHeight]="35"
                     [headerHeight]="35"
                     [footerHeight]="35"
                     [columns]="columns"
                     [limit]="10"
                     [columnMode]="'force'"&gt;
      &lt;/ngx-datatable&gt;
  
      &lt;ngx-datatable-row-detail [rowHeight]="100" #myDetailRow (toggle)="onDetailToggle($event)"&gt;
          &lt;ng-template let-row="row" let-expanded="expanded" ngx-datatable-row-detail-template&gt;
              &lt;div style="padding-left:35px;"&gt;
                  &lt;div&gt;&lt;strong&gt;Address&lt;/strong&gt;&lt;/div&gt;
                  &lt;div&gt;ggg&lt;/div&gt;
              &lt;/div&gt;
          &lt;/ng-template&gt;
      &lt;/ngx-datatable-row-detail&gt;
  
      &lt;ngx-datatable-column [width]="50"
                            [resizeable]="false"
                            [sortable]="false"
                            [draggable]="false"
                            [canAutoResize]="false"&gt;
          &lt;ng-template let-row="row" let-expanded="expanded" ngx-datatable-cell-template&gt;
              &lt;a href="javascript:void(0)"
                 [class.datatable-icon-right]="!expanded"
                 [class.datatable-icon-down]="expanded"
                 title="Expand/Collapse Row"
                 (click)="toggleExpandRow(row)"&gt;
              &lt;/a&gt;
          &lt;/ng-template&gt;
      &lt;/ngx-datatable-column&gt;
  </code></pre>
  
  <p>Below is my type script code.</p>
  
  <pre><code> toggleExpandRow(row) {
          console.log('Toggled Expand Row!', row);
          this.table.rowDetail.toggleExpandRow(row);
      }
  
      onDetailToggle(event) {
          console.log('Detail Toggled', event);
      }
  </code></pre>
  
  <p>I am following <code>https://swimlane.github.io/ngx-datatable/#row-details</code>.</p>
  
  <p>Can someone help me to figure out it this issue? Thank you</p>