title: Editing ngx-datatable styling issues
body: <p>I'm following the themeing setup for ngx-datatable.</p>
  
  <p>First I npm installed ngx-datatable 10.4.0 since this is compatible with Angular 4 and an earlier version of rxjs.</p>
  
  <p>My problem is with the styling of the table.</p>
  
  <p>My template file looks like this:</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;div&gt;
      &lt;ngx-datatable
          [rows]="rows"
          [columns]="columns"
          [columnMode]="'standard'"
          class="material"
          fixed-header
          [headerHeight]="50"
          [scrollbarV]="true"&gt;
      &lt;/ngx-datatable&gt;
  &lt;/div&gt;</code></pre>
  </div>
  </div>
  </p>
  
  <p>Inside of my scss file:</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-css lang-css prettyprint-override"><code>@import '~@swimlane/ngx-datatable/release/index.css';
  @import '~@swimlane/ngx-datatable/release/themes/material.css';
  @import '~@swimlane/ngx-datatable/release/themes/bootstrap.css';
  @import '~@swimlane/ngx-datatable/release/assets/icons.css';</code></pre>
  </div>
  </div>
  </p>
  
  <p>And I can confirm that the material styling works to a certain extent:
  <a href="https://i.stack.imgur.com/ixLuV.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ixLuV.png" alt="enter image description here"></a></p>
  
  <p>I wish to add a border-bottom under my header, but to no avail.</p>
  
  <p>If you check the demo: <a href="http://swimlane.github.io/ngx-datatable/#filter" rel="nofollow noreferrer">http://swimlane.github.io/ngx-datatable/#filter</a></p>
  
  <p>There is always a border-bottom for the sample tables.</p>
  
  <p>How do I configure the table to insert a border-bottom beneath the header?</p>
  
  <p>Is there a problem with my ngx-datatable setup?</p>