Use safe navigation when getting titles

Author: anitagraham

core/app/helpers/refinery/meta_helper.rb

@@ -21,7 +21,7 @@ def page_title(options = {})
       objects = (options[:chain_page_title] and object.respond_to?(:ancestors)) ? [object.ancestors, object] : [object]
 
       objects.flatten.compact.each do |obj|
-        obj_title = obj.title if obj.title
+        obj_title = obj&.title.presence
 
         # Only link when the object responds to a url method.
         if options[:link] && obj.respond_to?(:url)

images/app/views/refinery/admin/images/_form.html.erb

@@ -113,4 +113,4 @@
   <% end %>
 
   <% content_for :stylesheets, stylesheet_link_tag('cropper') -%>
-<% end %>
+<% end %>