Fix backend gallery show page go_back issue and theater exit fullscreen

app/views/admin/galleries/show.html.erb

@@ -162,6 +162,10 @@
       </div>
     </div>
 
+<script type="text/javascript">
+  var photosData = <%= @photos_data.html_safe %>;
+</script>
+
 <% content_for :page_specific_javascript do %>
   <%= javascript_include_tag "jquery.masonry.min.js" %>
   <%= javascript_include_tag "jquery.lite.image.resize.js" %>