title: Bootstrap 3: make a button group to fill column (with caret button)
body: <p>My goal is to fill a column with a couple of buttons. The first button has a text and should fill the remaining space in the column. The second is an icon. To be clear, that looks like an HTML select element with 'width: 100% ".</p>
  
  <p>The solution should be responsive. </p>
  
  <p><strong>HTML</strong></p>
  
  <pre><code>&lt;div class="row"&gt;
      &lt;div class="col-md-6"&gt;
          &lt;div class="btn-group"&gt;
              &lt;button type="button" class="btn btn-lg"&gt;
                  Select an Option
              &lt;/button&gt;
              &lt;button type="button" class="btn btn-lg"&gt;
                  &lt;span class="caret"&gt;&lt;/span&gt;
              &lt;/button&gt;
          &lt;/div&gt;
      &lt;/div&gt;
      &lt;div class="col-md-6"&gt;
          Other assets
      &lt;/div&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p><strong>PLUNKER</strong></p>
  
  <p><a href="http://plnkr.co/edit/NezDJL?p=preview" rel="nofollow">http://plnkr.co/edit/NezDJL?p=preview</a></p>