SPRINGFIELD — Legislation requiring Illinois county courthouses to have a private room for nursing mothers is one step closer to becoming law.The unanimously passed measure would mandate each building with a circuit courtroom include at least one lactation space by this January.Just one day earlier, state senators approved the Equal Rights Amendment, language for the U.S. Constitution to codify rights free of gender discrimination.Sen. Elgie R. Sims Jr., a Democrat from Chicago and Senate Bill 3503’s sponsor …