The Rev. Jesse Jackson’s family insisted Sunday that the civil-rights icon is in stable condition and “not on life support” in the wake of “inaccurate media reports’’ about his health. Jackson, 84, was admitted to Northwestern Memorial Hospital in Chicago last week and placed under observation over his progressive supranuclear palsy, a degenerative brain disorder, according to a statement from his Rainbow PUSH Coalition on Thursday. The nonprofit organization said at the time that Jackson was