[FIX] delay popup

[loco-odoo]

No description provided.

[robodoo]

This PR targets the un-managed branch odoo-dev/odoo:master-mysterious-egg, it needs to be retargeted before it can be merged.

[loco-odoo]

The problem of the first commit is that the units are saved in the data attribute. There is no problem in stable as selectDataAttribute removes the unit if needed. This can not be implemented in stable as this would have to be implemented at the shorthand action level that does not have access to the saveUnit info (see getActionsSpecs -> getAllActions -> getShorthandActions).
As the concept of a saveUnit is not that much used in the context of a data-attribute, I decided to go for a custom action.