Method clearUserData

Tools/LayoutEditor/WidgetContainer.cpp:89–99

	}

	void WidgetContainer::clearUserData(std::string_view _key)
	{
		for (MyGUI::VectorStringPairs::iterator item = mUserString.begin(); item != mUserString.end(); ++item)
		{
			if ((*item).first == _key)
			{
				mUserString.erase(item);
				break;
			}
		}
	}

	bool WidgetContainer::existUserData(std::string_view _key) const
	{