SPRINGFIELD — Barring a loss in a pending Cook County lawsuit, voters will get to weigh in this fall on whether an appointed panel should draw political maps in Illinois instead of legislators.And if public opinion polls over the last several years are any indicator, proponents of the plan have to like their chances.On Monday, the State Board of Elections unanimously endorsed its lawyer’s findings that the petitions seeking to have the matter on the fall ballot were sufficient.The board, however, said it would …