点击增加，默认展开子项（2604）

src/components/medicalTerm/AddAssistCheckMultRelation.vue

@@ -298,6 +298,10 @@ import apis from '@api/medicalTerm.js';
       },
       append(data, e) {
           e.stopPropagation()
+          if(!data.isExpanded) {
+            data.isExpanded = true
+            this.defaultExpandedArr.push(data.conceptId)
+          }
           this.addLevel = data.level+1;
           this.relationConceptId = data.conceptId
           this.operaList = data;