Bug
===
The web client expects the selection key to be at least an empty array.
(never false), like for a normal selection field, and so if the selection
has been created without an option, it crashes in the list view.
For consistency, we also set an array when there are no tags.
Task-3340671
closesodoo/odoo#123844
X-original-commit: 2e38397c2cfe0e4ed501d4ce7b98f0c47fe6c344
Signed-off-by: Rémy Voet <ryv@odoo.com>
Signed-off-by: Stéphane Debauche (std) <std@odoo.com>