[improvement] Panel: add icon prop (#1942)

packages/panel/index.vue

@@ -1,7 +1,13 @@
 <template>
   <cell-group :class="b()">
     <slot name="header">
-      <cell :class="b('header')" :title="title" :label="desc" :value="status" />
+      <cell
+        :class="b('header')"
+        :icon="icon"
+        :label="desc"
+        :title="title"
+        :value="status"
+      />
     </slot>
     <div :class="b('content')">
       <slot />
@@ -18,6 +24,7 @@ import create from '../utils/create';
 export default create({
   name: 'panel',
   props: {
+    icon: String,
     desc: String,
     title: String,
     status: String