Fix mobile contract search view
CHANGELOG:
### Fixed
- [#517](https://gitlab.com/coopdevs/odoo-somconnexio/-/merge_requests/517) Fix bug in mobile contract search view which didn't allow to search by partner.
With https://gitlab.com/coopdevs/odoo-somconnexio/-/merge_requests/496 we introduced a bug which lead to not modifying the "filter_domain" attribute from name, which broke searching by partner.
Edited by Pelayo García