[FIX] resource: Improve calendar duplicate

Purpose
=======

When duplicating a calendar, duplicate their global time off too.

closes odoo/odoo#49255

Taskid: 2230549
X-original-commit: b1417a8f094331246120ce5f0a5d25db6c6eb8a7
Signed-off-by: Yannick Tivisse (yti) <yti@odoo.com>

addons/resource/models/resource.py

@@ -184,7 +184,7 @@ class ResourceCalendar(models.Model):
         'resource.calendar.leaves', 'calendar_id', 'Time Off')
     global_leave_ids = fields.One2many(
         'resource.calendar.leaves', 'calendar_id', 'Global Time Off',
-        domain=[('resource_id', '=', False)]
+        domain=[('resource_id', '=', False)], copy=True,
         )
     hours_per_day = fields.Float("Average Hour per Day", default=HOURS_PER_DAY,
                                  help="Average hours per day a resource is supposed to work with this calendar.")
@@ -195,6 +195,15 @@ class ResourceCalendar(models.Model):
     two_weeks_calendar = fields.Boolean(string="Calendar in 2 weeks mode")
     two_weeks_explanation = fields.Char('Explanation', compute="_compute_two_weeks_explanation")
 
+    @api.returns('self', lambda value: value.id)
+    def copy(self, default=None):
+        self.ensure_one()
+        if default is None:
+            default = {}
+        if not default.get('name'):
+            default.update(name=_('%s (copy)') % (self.name))
+        return super(ResourceCalendar, self).copy(default)
+
     @api.depends('two_weeks_calendar')
     def _compute_two_weeks_explanation(self):
         today = fields.Date.today()