fix(测试跟踪): 用例评审点击不通过没有反应

--bug=1008914 --user=lyh 【测试跟踪】用例评审，不填写评论，点击不通过，没有反应，console有报错
https://www.tapd.cn/55049933/s/1081817

frontend/src/business/components/track/case/components/MsMarkDownText.vue

@@ -131,6 +131,12 @@ export default {
     },
     getContent() {
       return this.$refs.md.d_render;
+    },
+    getTextareaDom() {
+      return this.$refs.md.getTextareaDom();
+    },
+    toolbar_left_click(param) {
+      this.$refs.md.toolbar_left_click(param);
     }
   }
 }

frontend/src/business/components/track/review/commom/ReviewComment.vue

@@ -17,7 +17,7 @@
     <div>
       <div class="editors_div_style">
         <div id="editorsDiv" >
-          <ms-mark-down-text prop="description" :data="form" :toolbars="toolbars"/>
+          <ms-mark-down-text prop="description" :data="form" :toolbars="toolbars" ref="md"/>
         </div>
       </div>