ISRAEL’S head of mission in Rabat took up his post on yesterday, the Israeli foreign ministry said, under a deal to upgrade ties with Morocco, the fourth Arab country to forge relations with Israel in recent months. Israel's cabinet on Sunday approved the U.S.-brokered agreement reached last month with Morocco, which followed the United Arab Emirates, Bahrain and Sudan in moving towards normal ties with Israel. In a statement, the Israeli foreign ministry said the head of Israel's liaison office in Rabat, Ambassador David Govrin, and his staff will work towards advancing "political dialogue, tourism, economy and cultural ties" with…