The reified view on the res users will be dropped in the following commit.
The previous commit adds support to define each group as a computed field on the res users.
This commit defines:
- A boolean field for each 'isolated' res.group, i.e. a group in the hidden category.
- A selection field for each 'Application' res.group, i.e. a group in a application category.
Example:
- The group to manage pricelist in sales becomes a boolean field
- The groups project user/manager become a selection field