Merge pull request 'dd' (#546) from dd into master

Reviewed-on: http://git.feashow.cn/clay/mosr-web/pulls/546

src/views/workflow/common/Comment.vue

@@ -16,7 +16,7 @@
     <!--显示退回节点弹出框-->
     <div v-if="type === 4" style="margin-bottom: 10px">
       <span>回退节点：</span>
-      <el-select v-if="userTaskOption.length >0 " v-model="rollBackId" slot="prepend" placeholder="选择要回退到的节点" filterable>
+      <el-select v-if="userTaskOption.length >0 " v-model="rollBackId" slot="prepend" placeholder="选择要回退到的节点" filterable clearable>
         <el-option v-for="(option,index) in userTaskOption" :key="index"
                    :label="option.label" :value="option.value"/>
       </el-select>