[theme] Fix premium theme badge on the themes page for themes using a custom premium slug. (#818)

Author: fajardoleo

start.php

@@ -15,7 +15,7 @@
 	 *
 	 * @var string
 	 */
-	$this_sdk_version = '2.12.1.1';
+	$this_sdk_version = '2.12.1.2';
 
 	#region SDK Selection Logic --------------------------------------------------------------------
 

templates/js/style-premium-theme.php

@@ -17,18 +17,18 @@
 	 */
 	$fs = freemius( $VARS['id'] );
 
-	$slug = $fs->get_slug();
+	$premium_slug = $fs->get_premium_slug();
 
 ?>
 <script type="text/javascript">
 	(function ($) {
 		// Select the premium theme version.
-		var $theme             = $('#<?php echo $slug ?>-premium-name').parents('.theme'),
+		var $theme             = $('#<?php echo $premium_slug ?>-name').parents('.theme'),
 		    addPremiumMetadata = function (firstCall) {
 			    if (!firstCall) {
 				    // Seems like the original theme element is removed from the DOM,
 				    // so we need to reselect the updated one.
-				    $theme = $('#<?php echo $slug ?>-premium-name').parents('.theme');
+				    $theme = $('#<?php echo $premium_slug ?>-name').parents('.theme');
 			    }
 
 			    if (0 === $theme.find('.fs-premium-theme-badge-container').length) {