Add "Notes" to each element
Add Display Name for each
Add Refresh
Check how to deal with reloading the tree
Add Sub categories
Translate
Add "state" handling
Add UndoRedo

Move short callbacks from self to the object and call directly  (e.g. popup)

Use EditorFileSystem class to check for changes (external ones)

print_progress


Handle when switching from encrypted to non-encrypted and vice versa

# Progress?
get_status(story_item)
set_status(story_item, value)