Method detachFromLayer

MyGUIEngine/src/MyGUI_LayerManager.cpp:145–149

	}

	void LayerManager::detachFromLayer(Widget* _item)
	{
		MYGUI_ASSERT(nullptr != _item, "pointer must be valid");
		_item->detachFromLayer();
	}

	void LayerManager::upLayerItem(Widget* _item)
	{