title: React-bootstrap button with icon
body: <p>I can add a button with text in react-bootstrap using code like</p>
  
  <pre><code>        &lt;Button
            className={styles.feedbackButtonRating}
            variant={this.state.liked ? 'success' : 'light'}
            onClick={this.handleOnLikeClick}
          &gt;
            {FEEDBACK_LIKE_BUTTON_TEXT}
          &lt;/Button&gt;
  </code></pre>
  
  <p>Is there a way to replace <code>{FEEDBACK_LIKE_BUTTON_TEXT}</code> text with a thumb up icon?</p>