DataTable with structures containing TArray and TMap keeps increasing memory while no rows are selected

When using a DataTable based on a structure that includes TArray or TMap, if a row is not selected, the memory usage will continue to increase.

This is because in SDetailsViewBase::Tick, ForceRefresh() is called continuously due to Result == EPropertyDataValidationResult::ObjectInvalid.

To solve this issue, you can stop the Tick of the DetailView when it is not selected, as shown in the following code.

void SRowEditor::Restore()
{
...
    // add
    StructureDetailsView->GetWidget()->SetCanTick(!SelectedName->IsNone());

    RowSelectedCallback.ExecuteIfBound(FinalName);
} 

1. Create Struct having some TArray and TMap
2. Create Datatable based on 1
3. Open 2
4. Click an empty spot on DataTable Editor to unselect the row

result : memory usage keeps increasing

[UE-23848] Bug Status

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