Method OnTextSetFocus

UnitTests/UnitTest_HyperTextBox/HyperTextBox.cpp:492–497

	}

	void HyperTextBox::OnTextSetFocus(Widget* _sender, Widget* _old)
	{
		size_t count = _sender->getChildCount();
		if (count > 0)
			_sender->getChildAt(0)->setVisible(true);
	}

	void HyperTextBox::OnTextClick(Widget* _sender)
	{