Added propertyaccessor based multisort

- Twig extension
- Static method

__Tasks:__

- [x] test coverage
- [ ] gather feedback for my changes
- [ ] submit changes to the documentation

__Informations:__

| Q             | A
| ------------- | ---
| Tests pass?   | yes
| Fixed tickets | n/a
| BC Breaks     | n/a
| Doc           |