[FEATURE] [BUGFIX]  auto complete list events

__Tasks:__
- [x] complete yui doc for missing events
- [x] add event when all items were added
- [x] bugfix: only then emit initialized event when child auto-complete was initialized
- [ ] gather feedback for my changes

__Informations:__

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | yes
| Tests pass?   | yes
| Fixed tickets | [none]
| Doc           | none