JSY-8352 fix：DownListGroupItem中文字高亮

src/less/widget/downlist/popup.downlist.less

@@ -3,6 +3,10 @@
 .bi-down-list-popup {
   & .list-group-item-text {
     max-width: 203px;
+
+    &.active {
+      color: @color-bi-text-highlight;
+    }
   }
   & .bi-down-list-item {
     & .list-item-text {

src/widget/downlist/item.downlistgroup.js

@@ -16,12 +16,14 @@ BI.DownListGroupItem = BI.inherit(BI.BasicButton, {
         var o = this.options;
         var self = this;
         this.text = BI.createWidget({
-            type: "bi.label",
+            type: "bi.text_button",
             cls: "list-group-item-text",
             textAlign: "left",
             text: o.text,
             value: o.value,
-            height: o.height
+            height: o.height,
+            disableSelected: true,
+            selected: this._digest(o.value)
         });
 
         this.icon1 = BI.createWidget({
@@ -114,7 +116,9 @@ BI.DownListGroupItem = BI.inherit(BI.BasicButton, {
     },
 
     setValue: function (v) {
-        this.icon1.setSelected(this._digest(v));
+        const selected = this._digest(v);
+        this.icon1.setSelected(selected);
+        this.text.setSelected(selected);
     }
 });
 BI.DownListGroupItem.EVENT_CHANGE = "EVENT_CHANGE";