Do not set current record to the first id if the list is empty

Closes #13130
(grafted from 61da30b168e7a11392ac235bea43460bbb998873)

--HG--
branch : 7.0

sao/src/tab.js

@@ -506,8 +506,10 @@
                         attributes.res_id = [attributes.res_id];
                     }
                     screen.load(attributes.res_id);
-                    screen.current_record = screen.group.get(
-                        attributes.res_id[0]);
+                    if (attributes.res_id.length) {
+                        screen.current_record = screen.group.get(
+                            attributes.res_id[0]);
+                    }
                     screen.display();
                 } else {
                     if (screen.current_view.view_type == 'form') {

tryton/tryton/gui/window/form.py

@@ -66,7 +66,8 @@ class Form(TabContent):
             if isinstance(res_id, int):
                 res_id = [res_id]
             self.screen.load(res_id)
-            self.screen.current_record = self.screen.group.get(res_id[0])
+            if res_id:
+                self.screen.current_record = self.screen.group.get(res_id[0])
             self.screen.display()
         else:
             if self.screen.current_view.view_type == 'form':