Remove page blur on successful upload

cms/templates/textbooks.html

@@ -214,7 +214,7 @@ CMS.Views.UploadDialog = Backbone.View.extend({
             options.asset_path = response.url;
             chapter.set(options);
         }
-        this.remove();
+        this.hideAndRemove();
     },
     error: function() {
         this.model.set({