Do not call screen display when instance button modify a record

The method set_modified already take care of calling display to the proper
screens.

sao/src/screen.js

@@ -1975,10 +1975,6 @@
                             this.context).then(function(changes) {
                             record.set_on_change(changes);
                             record.set_modified();
-                            for (const screen of
-                                record.group.root_group.screens) {
-                                screen.display();
-                            }
                         });
                     } else {
                         return record.save(false).then(() => {