[FIX] helpdesk: fix activity default filter

Clicking on an Activity group used to set a default filter, in effect of which
user will only see helpdesk tickets with HIS activites that are overdue/today.

This behaviour got temporarily removed and than reintroduced with (ref.1)
(ref.1) achieves that by adding default filters to the search views, it issue
persisted in the helpdesk view becase filters wern't present.

This commits adds filters to the helpdesk's search view so they can be used
by mechanisms (re)introdcuted in (ref.1)

(ref.1)
[FIX] mail: Fix activity default filter issue
https://github.com/odoo/odoo/commit/3d18b9faa1fdcf00d48091ad4be244ca00d33524

[Reproduce steps]
- Install helpdesk
- (optional) create a helpdesk ticket where:
    - current user has a future activity
    - other user has an overdue activity
- open ActivityMenu dropdown (clock icon ".fa-clock-o")
- BUG (ux issue): filters aren't present
    - (if optional): created ticket is shown (beside current user not having any overdue/today activity in there)

opw-3859535


https://github.com/odoo/enterprise/assets/33809926/ca77aa45-f842-41a3-b551-d27e4b87a83b

Forward-Port-Of: odoo/enterprise#63748

Issue:
------
When we click on "Helpdesk Ticket" in the activities, we are redirected to the kanban view
(`helpdesk_ticket_view_kanban`), but no filter
is added.

Cause:
------
When going to the kanban view via activities,
the search view selected is
`helpdesk_ticket_view_search_analysis`,
which does not contain filters on the
`my_activity_date_deadline` field.

When we go to the kanban view via the "Tickets" button, we have the search view `helpdesk_tickets_view_search` which is correct. Via ticket button, we are taking `helpdesk_ticket_action_team` action that forces the search view with `helpdesk_tickets_view_search`.

Via ticket button:
helpdesk_tickets_view_search (priority: 20)
Via activity:
helpdesk_ticket_view_search_analysis (priority: 16)

16 is the default value for the `priority` field.

Solution:
---------
Set a priority lower than the default on the
`helpdesk_tickets_view_search` view,
to make sure it is selected.

opw-3976395

Forward-Port-Of: odoo/enterprise#64756

When task assignees have more than one task at the same time in field service, 
and tries to remove the planned date from one of the tasks,
A traceback will appear.

Steps to reproduce the error:
- Go to Field Service > Create a new task with the planned date and Assignees
- Create another task with the same planned date and Assignees > Save
- Now try to remove the planned date

Traceback:
```
AttributeError: 'bool' object has no attribute 'tzinfo'
  File "odoo/http.py", line 2254, in __call__
    response = request._serve_db()
  File "odoo/http.py", line 1829, in _serve_db
    return self._transactioning(_serve_ir_http, readonly=ro)
  File "odoo/http.py", line 1849, in _transactioning
    return service_model.retrying(func, env=self.env)
  File "odoo/service/model.py", line 134, in retrying
    result = func()
  File "odoo/http.py", line 1827, in _serve_ir_http
    return self._serve_ir_http(rule, args)
  File "odoo/http.py", line 1834, in _serve_ir_http
    response = self.dispatcher.dispatch(rule.endpoint, args)
  File "odoo/http.py", line 2059, in dispatch
    result = self.request.registry['ir.http']._dispatch(endpoint)
  File "odoo/addons/base/models/ir_http.py", line 220, in _dispatch
    result = endpoint(**request.params)
  File "odoo/http.py", line 740, in route_wrapper
    result = endpoint(self, *args, **params_ok)
  File "addons/web/controllers/dataset.py", line 38, in call_kw
    return self._call_kw(model, method, args, kwargs)
  File "addons/web/controllers/dataset.py", line 34, in _call_kw
    return call_kw(request.env[model], method, args, kwargs)
  File "odoo/api.py", line 458, in call_kw
    result = getattr(recs, name)(*args, **kwargs)
  File "addons/web/models/models.py", line 1011, in onchange
    todo = [
  File "addons/web/models/models.py", line 1014, in <listcomp>
    if field_name not in done and snapshot0.has_changed(field_name)
  File "addons/web/models/models.py", line 1127, in has_changed
    return self[field_name] != self.record[field_name]
  File "odoo/models.py", line 6608, in __getitem__
    return self._fields[key].__get__(self, self.env.registry[self._name])
  File "odoo/fields.py", line 1261, in __get__
    self.compute_value(recs)
  File "odoo/fields.py", line 1443, in compute_value
    records._compute_field_value(self)
  File "addons/mail/models/mail_thread.py", line 416, in _compute_field_value
    return super()._compute_field_value(field)
  File "odoo/models.py", line 4934, in _compute_field_value
    fields.determine(field.compute, self)
  File "odoo/fields.py", line 100, in determine
    return needle(*args)
  File "home/odoo/src/enterprise/saas-17.2/project_enterprise/models/project_task.py", line 227, in _compute_planning_overlap
    absolute_min_start = utc.localize(self[0].planned_date_begin)
  File "__init__.py", line 257, in localize
    if dt.tzinfo is not None:
```

https://github.com/odoo/enterprise/blob/74e8fa829cf17677ddcb29d91a0521d5d5b9a1b6/project_enterprise/models/project_task.py#L229-L230 When the user removes the planned date,
"planned_date_begin" and "date_deadline" will be False.
So it will lead to the above traceback.

sentry-5444639133

Forward-Port-Of: odoo/enterprise#63976