Update ViewInBrowserRenderer, Fix tracking config error

MAILPOET-4599

mailpoet/lib/Newsletter/ViewInBrowser/ViewInBrowserRenderer.php

@@ -15,8 +15,8 @@ class ViewInBrowserRenderer {
   /** @var Emoji */
   private $emoji;
 
-  /** @var bool */
+  /** @var TrackingConfig */
-  private $isTrackingEnabled;
+  private $trackingConfig;
 
   /** @var Renderer */
   private $renderer;
@@ -35,7 +35,7 @@ class ViewInBrowserRenderer {
     Links $links
   ) {
     $this->emoji = $emoji;
-    $this->isTrackingEnabled = $trackingConfig->isEmailTrackingEnabled();
+    $this->trackingConfig = $trackingConfig;
     $this->renderer = $renderer;
     $this->shortcodes = $shortcodes;
     $this->links = $links;
@@ -48,6 +48,8 @@ class ViewInBrowserRenderer {
     SendingQueueEntity $queue = null
   ) {
     $wpUserPreview = $isPreview;
+    $isTrackingEnabled = $this->trackingConfig->isEmailTrackingEnabled();
+
     if ($queue && $queue->getNewsletterRenderedBody()) {
       $body = $queue->getNewsletterRenderedBody();
       if (is_array($body)) {
@@ -83,7 +85,7 @@ class ViewInBrowserRenderer {
       $wpUserPreview
     );
     $renderedNewsletter = $this->shortcodes->replace($newsletterBody);
-    if (!$wpUserPreview && $queue && $subscriber && $this->isTrackingEnabled) {
+    if (!$wpUserPreview && $queue && $subscriber && $isTrackingEnabled) {
       $renderedNewsletter = $this->links->replaceSubscriberData(
         $subscriber->getId(),
         $queue->getId(),