Describing the services of pro bono lawyers in civil cases as “a limited resource,” a federal appeals court told judges to deny requests for counsel from indigent litigants who refuse to follow the rules.The 7th U.S. Circuit Court of Appeals last week upheld U.S. District Judge John Robert Blakey’s decision to dismiss an employment-discrimination lawsuit as a sanction for the plaintiff’s failure to prosecute the case.The court noted Blakey dismissed Fred Cartwright’s suit only after the fourth lawyer recruited to represent …