Return the display promise when creating a new record from the screen

This is necessary because otherwise it could result in concurrent update of the
models of the models used by the underlying widgets.

Closes #13545
(grafted from 1dfc23911f2a4cc071a34ec886dc43d949d4b68f)

--HG--
branch : 6.0

sao/src/screen.js

@@ -1516,10 +1516,10 @@
                     if (previous_view.view_type == 'calendar') {
                         previous_view.set_default_date(record, selected_date);
                     }
-                    this.display().done(function() {
+                    return this.display().then(function() {
                         this.set_cursor(true, true);
+                        return record;
                     }.bind(this));
-                    return record;
                 }.bind(this));
             }.bind(this));
         },