[IMP] sale_exception: Use hook to popup exception after rollback

With OCA/server-tools#3590 changing the way exceptions are detected,
the error raising doesn't allow to call _popup_exception as we used
to, but we can use the new hook to have the popup displayed as it
used to.

Author: grindtildeath

sale_exception/models/sale_order.py

@@ -47,11 +47,12 @@ def sale_check_exception(self):
         if orders:
             orders._check_exception()
 
+    def _must_popup_exception(self):
+        return self.env.company.sale_exception_show_popup
+
     def action_confirm(self):
         if self.detect_exceptions():
-            if not self.env.company.sale_exception_show_popup:
-                return
-            return self._popup_exceptions()
+            return
         return super().action_confirm()
 
     def action_draft(self):