KERNEL-9408 fix:修改其它框架实现图标的方式

demo/js/base/button/demo.button.js

@@ -376,6 +376,12 @@ Demo.Button = BI.inherit(BI.Widget, {
                     this.loaded();
                 }, 5 * 1000);
             },
+        }, {
+            type: "bi.button",
+            text: "图标的实现交给其他框架",
+            icon(element) {
+                element.append("<span>🧙</span>");
+            },
         }];
 
         return {

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

@@ -91,15 +91,16 @@
             }
 
             var iconInvisible = !o.loading && !o.iconCls;
-            if (BI.isObject(o.icon) && BI.isString(o.icon.type)) {
-                // FineUI 自定义 icon
+            if (BI.isPlainObject(o.icon)) {
                 this.icon = BI.createWidget(o.icon);
                 o.loading ? (this.icon.loading && this.icon.loading())
                     : (this.icon.loaded && this.icon.loaded());
             } else {
-                // ReactUI 自定义的 icon
-                if (!o.loading && BI.isObject(o.icon)) {
-                    this.icon = o.icon;
+                if (!o.loading && BI.isFunction(o.icon)) {
+                    this.icon = BI.createWidget({
+                        type: "bi.layout",
+                    });
+                    o.icon(this.icon.element);
                 } else {
                     this.icon = BI.createWidget({
                         type: "bi.icon_label",