Disgraced San Francisco city boss S heryl Davis preached about human rights , but allegedly squandered a fortune in taxpayer funds on luxe travel, sports tickets, her son’s college tuition and personal PR — now landing her in jail on 17 charges. The former head of the San Francisco Human Rights Commission and her longtime live-in partner are facing felony charges for allegedly using money intended to help the city’s black communities for personal benefit. “This is certainly a lesson for the