Brian Steinberg Senior TV EditorSmartmatic, a maker of voting technology whose name has been the subject of disparaging commentary from a handful of conservative-news outlets, on Thursday said it had sued Fox News and three of its popular on-air personalities — Lou Dobbs, Maria Bartiromo and Jeanine Pirro — for more than $2.7 billion, citing efforts made on Fox News programs to disparage the company’s business.Rudy Giuliani and Sidney Powell, two attorneys who had been working for President