- Separate common methods into interface, allowing multiple
inheritance architecture (to use any implemented AbstractModel)
- Code factorization between PL/ML models (and PL/ML Items)
- Use proxy model for views and redirection to the PL/ML models.
Fixes filtering and also really make use of the current model (only the
PL Model was really used before, models were half switched).
- stop storing/serializing selection indexes
- ML Missing locks and bug fixes
- Move ML callback into event loop
- ML Items leaks fixes
- Code factorization
- Dead code removal