UInteractiveToolActivity::~UInteractiveToolActivity

Note about the below: we didn't really need to repeat [Setup()](API\Plugins\ModelingComponents\UInteractiveToolActivity\Setup), [Tick()](API\Plugins\ModelingComponents\UInteractiveToolActivity\Tick), and [Render()](API\Plugins\ModelingComponents\UInteractiveToolActivity\Render) here since these are staying the same as [UInteractionMechanic](API\Runtime\InteractiveToolsFramework\UInteractionMechanic) and get inherited.