bugfix

src/components/ImageUpload/index.vue

@@ -32,6 +32,7 @@
     </div>
 
     <el-dialog
+      draggable
       v-model="dialogVisible"
       title="预览"
       width="800px"

src/components/RightToolbar/index.vue

@@ -23,7 +23,7 @@
         <el-button circle icon="Menu" @click="showColumn()" />
       </el-tooltip>
     </el-row>
-    <el-dialog :title="title" v-model="open" append-to-body>
+    <el-dialog draggable :title="title" v-model="open" append-to-body>
       <el-transfer
         :titles="['显示', '隐藏']"
         v-model="value"