update

src/base/single/button/buttons/button.js

@@ -59,7 +59,8 @@ BI.Button = BI.inherit(BI.BasicButton, {
                 height: o.height - 2
             });
             BI.createWidget({
-                type: "bi.default",
+                type: "bi.center_adapt",
+                cls: o.iconCls,
                 element: this,
                 hgap: o.hgap,
                 vgap: o.vgap,
@@ -67,14 +68,10 @@ BI.Button = BI.inherit(BI.BasicButton, {
                 bgap: o.bgap,
                 lgap: o.lgap,
                 rgap: o.rgap,
-                items: [{
-                    type: "bi.center_adapt",
-                    cls: o.iconCls,
                 items: [{
                     type: "bi.horizontal",
                     items: [this.icon, this.text]
                 }]
-                }]
             });
         } else {
             this.text = BI.createWidget({