FDL-4442 fix: downListCombo单边框时去掉圆角

src/widget/textvaluedownlistcombo/combo.textvaluedownlist.js

@@ -5,7 +5,7 @@
 BI.TextValueDownListCombo = BI.inherit(BI.Widget, {
     _defaultConfig: function (config) {
         return BI.extend(BI.TextValueDownListCombo.superclass._defaultConfig.apply(this, arguments), {
-            baseCls: "bi-text-value-down-list-combo bi-border-radius " + (config.simple ? "bi-border-bottom" : "bi-border"),
+            baseCls: "bi-text-value-down-list-combo " + (config.simple ? "bi-border-bottom" : "bi-border bi-border-radius"),
             height: 24,
         });
     },