feat: Se implementa cambio de estado al remover operario

prospect.py

@@ -39,6 +39,8 @@ class Prospect(ModelSQL, ModelView):
     def on_change_assigned_operator(self):
         if self.assigned_operator:
             self.state = 'assigned'
+        else:
+            self.state = 'unassigned'
 
 
 class ContactMethod(ModelSQL, ModelView):

tests/scenario_sale_opportunity_management.rst

@@ -87,6 +87,12 @@ Asignar operario a un prospecto::
     >>> prospect.state
     'assigned'
 
+Remover operario asignado de un prospecto::
+    >>> prospect.assigned_operator = None
+    >>> prospect.state
+    'unassigned'
+
+
 ------------------------------------
 Asignación de prospectos a operarios
 ------------------------------------