SPRINGFIELD — Illinois’ high court ruled potential jurors can be asked questions pertaining to their biases about participation in gang activities but not about sexual history.The case centers on whether the defendant, Theophil Encalado, was wrongly convicted on three counts of aggravated criminal sexual assault due to an unfair trial.His representation before the Supreme Court, Jennifer L. Bontrager, argued the trial judge should have allowed potential jury members to be asked if they could fairly consider …