U hover style in select list

SE/static/p5UI/main.css

@@ -47,3 +47,5 @@ body { margin:0; font-size:12px; line-height:18px; }
 caption { font-size:medium }
 
 .input-xs { height:22px; font-size:12px; line-height:1.2em; padding:3px 8px; }
+
+.selectize-dropdown .active { background-color: #d9edf7 }