title: Subtitle not shown in single product page using WooCommerce Product Subtitle plugin
body: <p>I'm using WooCommerce with Flatsome Theme.<br>
  I want to add a subtitle to my products.<br>
  I installed the WooCommerce Product Subtitle plugin and I see the subtitles only at the shop page, but NOT in the single product page.<br></p>
  
  <p>I was looking much around the internet but not success.<br>
  In the plugin area, I see this help offer:</p>
  
  <p>F.A.Q.s<br>
  1.Subtitle not visible in single product page?</p>
  
  <p>This issue might be with the theme which you are using<br>
  Please do make sure that your theme has woocommerce_single_product_summary filter in the below files</p>
  
  <p>woocommerce_single_product_summary filter file list :</p>
  
  <ol>
  <li>your-theme/woocommerce/content-product.php</li>
  </ol>
  
  <p><strong>What do I have to do? Here is the page:</strong></p>
  
  <pre><code>&lt;?php
  /**
   * The template for displaying product content within loops
   */
  
  defined( 'ABSPATH' ) || exit;
  
  global $product;
  
  // Ensure visibility.
  if ( empty( $product ) || ! $product-&gt;is_visible() ) {
      return;
  }
  
  // Check stock status.
  $out_of_stock = get_post_meta( $post-&gt;ID, '_stock_status', true ) == 'outofstock';
  
  // Extra post classes.
  $classes   = array();
  $classes[] = 'product-small';
  $classes[] = 'col';
  $classes[] = 'has-hover';
  
  if ( $out_of_stock ) $classes[] = 'out-of-stock';
  
  ?&gt;
  
  &lt;div &lt;?php fl_woocommerce_version_check( '3.4.0' ) ? wc_product_class( $classes ) : post_class( $classes ); ?&gt;&gt;
      &lt;div class="col-inner"&gt;
      &lt;?php do_action( 'woocommerce_before_shop_loop_item' ); ?&gt;
      &lt;div class="product-small box &lt;?php echo flatsome_product_box_class(); ?&gt;"&gt;
          &lt;div class="box-image"&gt;
              &lt;div class="&lt;?php echo flatsome_product_box_image_class(); ?&gt;"&gt;
                  &lt;a href="&lt;?php echo get_the_permalink(); ?&gt;"&gt;
                      &lt;?php
  
                          /**
                           *
                           * @hooked woocommerce_get_alt_product_thumbnail - 11
                           * @hooked woocommerce_template_loop_product_thumbnail - 10
                           */
                          do_action( 'flatsome_woocommerce_shop_loop_images' );
                      ?&gt;
                  &lt;/a&gt;
              &lt;/div&gt;
              &lt;div class="image-tools is-small top right show-on-hover"&gt;
                  &lt;?php do_action( 'flatsome_product_box_tools_top' ); ?&gt;
              &lt;/div&gt;
              &lt;div class="image-tools is-small hide-for-small bottom left show-on-hover"&gt;
                  &lt;?php do_action( 'flatsome_product_box_tools_bottom' ); ?&gt;
              &lt;/div&gt;
              &lt;div class="image-tools &lt;?php echo flatsome_product_box_actions_class(); ?&gt;"&gt;
                  &lt;?php do_action( 'flatsome_product_box_actions' ); ?&gt;
              &lt;/div&gt;
              &lt;?php if ( $out_of_stock ) { ?&gt;&lt;div class="out-of-stock-label"&gt;&lt;?php _e( 'Out of stock', 'woocommerce' ); ?&gt;&lt;/div&gt;&lt;?php } ?&gt;
          &lt;/div&gt;&lt;!-- box-image --&gt;
  
          &lt;div class="box-text &lt;?php echo flatsome_product_box_text_class(); ?&gt;"&gt;
              &lt;?php
                  do_action( 'woocommerce_before_shop_loop_item_title' );
  
                  echo '&lt;div class="title-wrapper"&gt;';
                  do_action( 'woocommerce_shop_loop_item_title' );
                  echo '&lt;/div&gt;';
  
  
                  echo '&lt;div class="price-wrapper"&gt;';
                  do_action( 'woocommerce_after_shop_loop_item_title' );
                  echo '&lt;/div&gt;';
  
                  do_action( 'flatsome_product_box_after' );
  
              ?&gt;
          &lt;/div&gt;&lt;!-- box-text --&gt;
      &lt;/div&gt;&lt;!-- box --&gt;
      &lt;?php do_action( 'woocommerce_after_shop_loop_item' ); ?&gt;
      &lt;/div&gt;&lt;!-- .col-inner --&gt;
  &lt;/div&gt;&lt;!-- col --&gt;
  </code></pre>