bunch of minor fixes

back-office/app/models/sub_category.rb

@@ -9,8 +9,11 @@ class SubCategory < ActiveRecord::Base
   end
 
   def custom_subcat_name
+    return self.name if not self.category
+
     cat = self.category.name
     section = self.category.section.name
+
     "#{section} -> #{cat} -> #{self.name}"
   end
 end