[Asset Editor] Image Preview issues (#976)

* Added png, changed order of transformations

* Added png, changed order of transformations

Author: mcop1

public/img/tree-preview-transparent-background.png

@@ -227,14 +227,6 @@ private function getDefaultImageThumbnailConfig(): ImageThumbnailConfig
         $previewThumbnail->setName(Thumbnails::DEFAULT_STUDIO_THUMBNAIL_ID->value);
         $previewThumbnail->setFormat(MimeTypes::PJPEG->value);
         $previewThumbnail->setQuality(60);
-        $previewThumbnail->addItem(
-            'setBackgroundImage',
-            [
-                //ToDo: Replace with the path to the actual image once its present in Studio UI
-                'path' => '/bundles/pimcoreadmin/img/tree-preview-transparent-background.png',
-                'mode' => 'asTexture',
-            ]
-        );
         $previewThumbnail->addItem(
             'contain',
             [
@@ -243,6 +235,13 @@ private function getDefaultImageThumbnailConfig(): ImageThumbnailConfig
                 'forceResize' => false,
             ]
         );
+        $previewThumbnail->addItem(
+            'setBackgroundImage',
+            [
+                'path' => '/bundles/pimcorestudiobackend/img/tree-preview-transparent-background.png',
+                'mode' => 'asTexture',
+            ]
+        );
 
         return $previewThumbnail;
     }