Begin restoring file menu operations
Add full featured copy functionality to the Files factory
Update file menu and modal front ends with Copy action
Add e2e test for file menu copy action
Add file menu option for temporary feature copying
Fix duplicating bug when adding an existing leaf
Wire up file delete for the Files factory
Wire up file move for the Files factory

Conflicts:
        app/components/filetree/filetree-service_test.js
Expose the Move controls on the frontend
Wire up 'Move' in the editor-nav
Remove failing editor controller test; replaced in files-factory_test
Merge branch 'file-menu'
Merge branch 'filetree-duplicate-add'