fix link in Combobox doc
fix link in Combobox doc

tkrugg/deliteful,cjolif/deliteful,tkrugg/deliteful,harbalk/deliteful,brunano21/deliteful,brunano21/deliteful,cjolif/deliteful,EAlexRojas/deliteful,harbalk/deliteful,kitsonk/deliteful,EAlexRojas/deliteful,kitsonk/deliteful