Before this patch, when searching with the "equals to" operator in any
x2many field, the searched parameter was always `undefined`.
The problem was that the underlying field manager implementation was
treating those fields as x2many, while the widget used was the `one2many`
one.
This patch simply mocks the underlying fake record to make think that
any relational field is always a `one2many`. This sets all pieces in
place and makes the field manager work as expected, and thus you can
search as expected too.
* Complete migration to v11
* Refactor to use the new v11 decoupled widgets system
* Advanced search is now a high-level feature from the filters menu; it simplifies code a lot, and the UX is even better
* Split README system
* Add fun to ROADMAP
* Addon is renamed to web_advanced_search, since it enhaces the searching experience for all kind of fields now
Simone Orsi
Jairo Llopis