Fix tg previews X axis broken in last commit if no rows
Fix tg previews X axis broken in last commit if no rows

Sausageo/jmeter-plugins,ptrd/jmeter-plugins,Sausageo/jmeter-plugins,ptrd/jmeter-plugins,Sausageo/jmeter-plugins,Sausageo/jmeter-plugins,ptrd/jmeter-plugins,ptrd/jmeter-plugins,Sausageo/jmeter-plugins,ptrd/jmeter-plugins