预览按钮垂直居中

src/views/template/components/PreviewTemplate.vue

@@ -93,6 +93,7 @@ export default class PreviewTemplate extends Vue {
         right: 0;
         display: flex;
         flex-direction: row;
+        align-items: center;
         padding: 10px;
         font-size: 16px;
         box-shadow:0px 2px 4px 0px rgba(241,243,251,1);