LAWRENCE, Kan. — Before Kansas’ Border Showdown game against the visiting Missouri Tigers on Saturday, former Jayhawks standout Thomas Robinson had a message for the current KU men’s basketball players. “It’s personal,” advised Robinson, whose jersey was retired during a halftime ceremony at Allen Fieldhouse. The second-ranked Jayhawks seemed to heed those words in beating the Tigers, 73-64. Kevin McCullar and KJ Adams scored 17 points apiece as Kansas earned its fifth straight victory over Missouri. The Jayhawks (9-1) improved to 176-95 all time against the Tigers, who haven’t won in Lawrence…