Duplicate categories and subcategories

Hi,

Quite often, I have a hierarchy in Docman that repeats itself. Imaginary example:

Dogs >> Food >> Young animals
Dogs >> Food >> Adult animals
Dogs >> Food >> Elderly animals
Dogs >> Hygiene
Dogs >> Psychology

Cats >> Food >> Young animals
Cats >> Food >> Adult animals
Cats >> Food >> Elderly animals
Cats >> Hygiene
Cats >> Psychology

Fish >> Food >> Young animals
Fish >> Food >> Adult animals
Fish >> Food >> Elderly animals
Fish >> Hygiene
Fish >> Psychology

In Joomla article manager, you can easily copy a category (including all its subcategories, and all the settings). This feature miss it so painfully in Docman...