Feat/activity list sort
CHANGELOG:
### Added
- [#1126](https://git.coopdevs.org/coopdevs/som-connexio/odoo-somconnexio/-/merge_requests/1126) Added order attribute to view
Related card: https://trello.com/c/RVoj1GAf/1750-llista-activitats-canvi-en-ordenaci%C3%B3
Edited by Carla Berenguer