title: ReactStrap modal close icon is not getting show in the modal and How to use the header with some another tag
body: <p>I am new to the react js. Here I am using the Modal of <code>reactStrap</code>.</p>
  
  <pre><code>&lt;Modal isOpen={props.isOpen} centered='true'&gt;
          &lt;ModalHeader&gt;
            Change this Question?
            &lt;button type="button" class="close" aria-label="Close" onClick={props.closeModal} &gt;&lt;span aria-hidden="true"&gt;×&lt;/span&gt;&lt;/button&gt;
          &lt;/ModalHeader&gt;
          &lt;ModalBody&gt;
            &lt;div className="row"&gt;
              &lt;div className="col-md-12 text-center "&gt;
                &lt;Button type="submit" className="btn btn-outline-primary" onClick={props.showChangeQuestionModal} &gt;Change by creating your own Question&lt;/Button&gt;
              &lt;/div&gt;
            &lt;/div&gt;
            &lt;div className="row"&gt;
              &lt;div className="col-md-12 text-center marginForOrOption"&gt;
                &lt;span&gt;or&lt;/span&gt;
              &lt;/div&gt;
            &lt;/div&gt;
            &lt;div className="row"&gt;
              &lt;div className="col-md-12 text-center"&gt;
                &lt;Button type="submit" color="btn btn-primary"&gt;Change and Replace from Question bank&lt;/Button&gt;
              &lt;/div&gt;
            &lt;/div&gt;
          &lt;/ModalBody&gt;
          &lt;ModalFooter&gt;
          &lt;/ModalFooter&gt;
        &lt;/Modal&gt;
      &lt;/div&gt;
  </code></pre>
  
  <p>Now Here I have added that button to close modal . But In reactstrap it comes by default.But In  my case it is not coming .</p>
  
  <p>Another problem is that,
  In the ModalHeader, It comes by default h5 so How can I change that ?</p>