in PhotoEditor/DetailPage.cpp [216:224]
void DetailPage::CancelEffectsButton_Click(IInspectable const&, RoutedEventArgs const&)
{
UpdatePanelState();
EffectPreviewGrid().SelectedItems().Clear();
for (auto&& effectItem : m_selectedEffectsTemp)
{
EffectPreviewGrid().SelectedItems().Append(effectItem);
}
}