Use tags assocation in DuplicateElement
Use tags assocation in DuplicateElement

`tag_list` generates a query for each element, even if they're already
loaded.

AlchemyCMS/alchemy_cms,AlchemyCMS/alchemy_cms,robinboening/alchemy_cms,robinboening/alchemy_cms,robinboening/alchemy_cms,AlchemyCMS/alchemy_cms