[mockup] Category Management

hello an other couple of idea for category gestion in table
[attachment=0:321fsq9x]<!-- ia0 -->Sans-titre-1.jpg<!-- ia0 -->[/attachment:321fsq9x]

1 drag and drop ordering main category
2 slide down to display subcategory
3 drag and drop ordering sub category
when you drag and hold a category on an other it slidesdown => result this category become a subcategory
4 copy/move categorie like copy move item