The no content helper logic (determining when it is displayed) in
kanban is quite complicated. Apparently, in a kanban view grouped
on a field that isn't a many2one, with no groups (and thus no
records), and where we don't have the "group_create" permission,
we want the no content helper to be displayed. At least, this is
how it used to work in the legacy kanban view. This commit restores
the previous behavior and encodes this situation in a test. In the
future, it would probably be a good idea to sit down and challenge
the corner cases of this feature.
closesodoo/odoo#99914
Signed-off-by: Aaron Bohy (aab) <aab@odoo.com>