JSY-20326 fix: 【组件问题】带清除按钮的单选下拉框，清除后需要恢复到默认值

demo/js/widget/singletree/demo.single_tree_combo.js

@@ -16,7 +16,7 @@ Demo.SingleTreeCombo = BI.inherit(BI.Widget, {
                 ref: function (_ref) {
                     self.tree = _ref;
                 },
-                text: "默认值",
+                defaultText: "请选择",
                 items: items,
                 width: 300,
                 value: "11"

src/widget/singletree/singletree.combo.js

@@ -25,6 +25,7 @@ BI.SingleTreeCombo = BI.inherit(BI.Widget, {
         this.trigger = BI.createWidget(BI.extend({
             type: "bi.single_tree_trigger",
             text: o.text,
+            defaultText: o.defaultText,
             height: o.height,
             items: o.items,
             value: o.value,

src/widget/singletree/singletree.trigger.js

@@ -26,6 +26,7 @@ BI.SingleTreeTrigger = BI.inherit(BI.Trigger, {
             type: "bi.select_text_trigger",
             element: this,
             text: o.text,
+            defaultText: o.defaultText,
             items: o.items,
             height: o.height,
             warningTitle: o.warningTitle,