[FIX] sale_timesheet: description field of timesheet line fits to parent

Steps to reproduce:

- Install Sales, Project, Timesheets.
- Go to a task inside Project, and to the Timesheets tab.
- Create or modify a timesheet line, and write a very long description.

Issue:

The description field of the timesheet line is not fitting to the parent
instead is fitting for the content inside description making the table
bigger than it should.

Solution:

We have a custom widget for timesheet_ids field when we have
sale_timesheet and the widget is missing the `o_field_one2many` class.
So we add the proper class to the component with `TimesheetsOne2ManyField`

opw-3145298

closes odoo/odoo#112631

X-original-commit: e73d7c4c3cddabdbb5d175681cbfe3789d846239
Signed-off-by: Xavier Bol (xbo) <xbo@odoo.com>
Signed-off-by: Maruan Aguerdouh Mohtar (magm) <magm@odoo.com>

addons/sale_timesheet/static/src/components/so_line_field/so_line_field.js

@@ -2,6 +2,7 @@
 
 import { registry } from "@web/core/registry";
 import { Many2OneField } from "@web/views/fields/many2one/many2one_field";
+import { X2ManyField } from "@web/views/fields/x2many/x2many_field";
 
 export class SoLineField extends Many2OneField {
     setup() {
@@ -17,5 +18,8 @@ export class SoLineField extends Many2OneField {
     }
 }
 
-registry.category("fields").add('so_line_one2many', registry.category('fields').get("one2many")); // TODO: Remove me when the gantt view is converted in OWL
+export class TimesheetsOne2ManyField extends X2ManyField {}
+TimesheetsOne2ManyField.additionalClasses = ['o_field_one2many'];
+registry.category("fields").add('so_line_one2many', TimesheetsOne2ManyField); // TODO: Remove me when the gantt view is converted in OWL
+
 registry.category("fields").add("so_line_field", SoLineField);