CollectionChangeListener is invoked twice if table sorting is saved in settings

[Flaurite]

Environment

• Platform version: 7.0.1

Description of the bug or enhancement

Probably, it applies also to DataGrid and Table inheritors.
Attached project: demo.zip

• Minimal reproducible example
  In the attached project:

1. Create some customers;
2. In the CustomerBrowse screen set sorting to some column; close screen;
3. Open CustomerBrowse screen again.

• Expected behavior
  Only one notification with "CollectionChange" should be shown.
• Actual behavior
  Two notifications are shown.

[knstvk]

In order to have only one CollectionChangeEvent when screen is opened with saved sorting, you should remove the LoadDataBeforeShow annotation and load data in AfterShowEvent listener:

@UiController("demo_Customer.browse")
@UiDescriptor("customer-browse.xml")
@LookupComponent("customersTable")
//@LoadDataBeforeShow
public class CustomerBrowse extends StandardLookup<Customer> {

    @Subscribe
    private void onAfterShow(AfterShowEvent event) {
        getScreenData().loadAll();
    }