title: componentDidMount is not working when redirect to a screen
body: <p>I am having <code>componentDidMount</code> to list set of files(images) in a screen A, from this screen A I am having another screen B link where I can see detailed view of a file and there I have an option to delete a document.</p>
  
  <p>When screen A is called using </p>
  
  <pre><code>  &lt;TouchableOpacity style={Styles.HomeButton} onPress={ () =&gt; this.props.navigation.navigate('Gallery')}&gt;
       &lt;Text style={Styles.HomeButtonText}&gt;View Photos&lt;/Text&gt;
    &lt;/TouchableOpacity&gt;
  </code></pre>
  
  <p><code>componentDidMount</code> working fine, But when I delete a file (i am using react-native-fs) on unlink callback I am calling the navigation like</p>
  
  <pre><code>this.props.navigation.navigate('Gallery');
  </code></pre>
  
  <p>Which is working fine redirecting to Screen A, but <code>componentDidMount</code> is not working which means I can still see that deleted file in the list. 
  i.e Screen A is not refreshing, is there any possible solution?</p>