We do the following improvement:
- some wording changes
- the activity templates can be edited directly in the list view instead of in
a popup except in hr because sub module add too many field to be edited in
directly in the list view.
- when scheduling a plan, the due date of the created activities are computed
as the plan_date_deadline + activity type delay and if the plan_date_deadline
is not specified, as today + activity type delay.
- there were 2 res_model fields in the mail_activity_plan_view_form that was
causing a selection box to appears on many form where the model shouldn't be
selectable. We remove one of them here.
Task-3558929
Part-of: odoo/odoo#138998