fix: 使用默认组件数据需要深拷贝，防止撤销出问题 woai3c#124

src/store/snapshot.js

@@ -4,7 +4,7 @@ import { deepCopy } from '@/utils/utils'
 // 设置画布默认数据 https://github.com/woai3c/visual-drag-demo/issues/92
 let defaultcomponentData = []
 function getDefaultcomponentData() {
-    return defaultcomponentData
+    return JSON.parse(JSON.stringify(defaultcomponentData))
 }
 
 export function setDefaultcomponentData(data = []) {

src/views/Home.vue

@@ -164,6 +164,7 @@ export default {
             width: 288px;
             right: 0;
             top: 0;
+
             .el-select {
                 width: 100%;
             }