Pull request #2964: BI-110963 IconCombo支持隐藏tigger图标

Merge in VISUAL/fineui from ~JEFFREY.ZHANG/fineui:master to master

* commit '3f69775db9f1bed3977947db0e45ff4bdc99de7e':
  BI-110963 fix: IconCombo支持隐藏tigger图标
  BI-110963 fix: IconCombo支持隐藏tigger图标

src/case/combo/iconcombo/combo.icon.js

@@ -20,7 +20,8 @@ BI.IconCombo = BI.inherit(BI.Widget, {
             adjustXOffset: 0,
             adjustYOffset: 0,
             offsetStyle: "left",
-            chooseType: BI.ButtonGroup.CHOOSE_TYPE_SINGLE
+            chooseType: BI.ButtonGroup.CHOOSE_TYPE_SINGLE,
+            isShowDown: true
         });
     },
 
@@ -42,7 +43,8 @@ BI.IconCombo = BI.inherit(BI.Widget, {
             height: o.height,
             iconWidth: o.iconWidth,
             iconHeight: o.iconHeight,
-            value: o.value
+            value: o.value,
+            isShowDown: o.isShowDown
         });
         this.popup = BI.createWidget(o.popup, {
             type: "bi.icon_combo_popup",