[FIX] sale_timesheet: don't count expense as record hours on SO

Issue:
Expenses linked to an SO are counted as 1 hour of timesheet linked
to the SO.

Steps to reproduce:
- Install Sales, Timesheets, Expense
- Create an SO and sell a service that creates a Task > Confirm
- Log some timesheet on the task (3h for ex.)
- Create an expense related to the SO, approve it and generate the
  journal entries.
- On the SO, the smart button shows 4h clocked, and when you click
  on it, the expense line is showed, which shouldn't be the case.

Cause:
Incorrect domain taking the `order_line` without filtering on the
fact that they may be expenses or not.

Fix:
Specify the domain on the action to exclude expense lines.

Affected versions:
- 14.0 - count is correct, only action is showing more lines
- 15.0 - same as described in the commit msg
- saas-15.2
- 16.0
- saas-16.1
- saas-16.2
- saas-16.3
- master

opw-3302460

closes odoo/odoo#128764

X-original-commit: 7ee275a4a454898989d15f42941f4a1bb7a48db9
Signed-off-by: Xavier Bol (xbo) <xbo@odoo.com>
Signed-off-by: Piryns Victor (pivi) <pivi@odoo.com>

addons/sale_timesheet/models/sale_order.py

@@ -126,7 +126,7 @@ class SaleOrder(models.Model):
                 context['default_project_id'] = self.project_ids[0].id
         action.update({
             'context': context,
-            'domain': [('so_line', 'in', self.order_line.ids)],
+            'domain': [('so_line', 'in', self.order_line.ids), ('project_id', '!=', False)],
             'help': _("""
                 <p class="o_view_nocontent_smiling_face">
                     No activities found. Let's start a new one!