Demo:修复在节点样式侧边栏里无法去除节点的文本修饰线样式的问题

web/src/lang/en_us.js

@@ -167,6 +167,7 @@ export default {
     italic: 'Italic',
     textDecoration: 'Text decoration',
     underline: 'Underline',
+    none: 'None',
     lineThrough: 'Line through',
     overline: 'Overline',
     border: 'Border',

web/src/lang/zh_cn.js

@@ -166,6 +166,7 @@ export default {
     addFontWeight: '加粗',
     italic: '斜体',
     textDecoration: '划线',
+    none: '无',
     underline: '下划线',
     lineThrough: '中划线',
     overline: '上划线',

web/src/pages/Edit/components/Style.vue

@@ -142,6 +142,9 @@
               v-model="style.textDecoration"
               @change="update('textDecoration')"
             >
+              <el-radio-button label="none">{{
+                $t('style.none')
+              }}</el-radio-button>
               <el-radio-button label="underline">{{
                 $t('style.underline')
               }}</el-radio-button>