Pull request #1552: 无JIRA任务 fix: bi.trigger_icon_button 添加overflow-hidden .小三角transform: rotate(0)的过程会闪滚动条

Merge in VISUAL/fineui from ~DAILER/fineui:master to master

* commit '68d3b6ff7d9e8136c88b63e6c6ce8815b7ad159b':
  无JIRA任务 fix: bi.trigger_icon_button 添加overflow-hidden .小三角transform: rotate(0)的过程会闪滚动条

src/case/button/icon/icon.trigger.js

@@ -10,7 +10,7 @@ BI.TriggerIconButton = BI.inherit(BI.IconButton, {
     _defaultConfig: function () {
         var conf = BI.TriggerIconButton.superclass._defaultConfig.apply(this, arguments);
         return BI.extend(conf, {
-            baseCls: (conf.baseCls || "") + " bi-trigger-icon-button",
+            baseCls: (conf.baseCls || "") + " bi-trigger-icon-button overflow-hidden",
             extraCls: "pull-down-font"
         });
     }