This simple addon provides a front user menu tree where user can adds and removes categories on first level or in subdirectories.
npm install ember-cli-minimal-tree
ember server- Visit your app at http://localhost:4200.
Check on tests/dummy for a easy example, run ember serve.
This addon is pretty minimalistic isn't it ? The reason of his born was first for education and next cause i did'nt find a way to make run more usefull but complex projects who could serve this purpose, i'll see in a near time if tree project like will work more easily with latest version of ember.