Method upFolder

UnitTests/UnitTest_GraphView/OpenSaveFileDialog.cpp:133–141

	}

	void OpenSaveFileDialog::upFolder()
	{
		size_t index = mCurrentFolder.find_last_of(L"\\/");
		if (index != std::string::npos)
		{
			mCurrentFolder = mCurrentFolder.substr(0, index);
		}
		update();
	}

	void OpenSaveFileDialog::setCurrentFolder(const MyGUI::UString& _folder)
	{