fix(测试跟踪): 编辑用例模块层级较多时，不显示模块名称

--bug=1023513 --user=陈建星 【测试跟踪】功能用例，导入的用例编辑时不显示所属模块 https://www.tapd.cn/55049933/s/1340321

test-track/frontend/src/business/case/components/case/CaseBaseInfo.vue

@@ -573,7 +573,7 @@ export default {
           return node;
         } else {
           if (node.children && node.children.length > 0) {
-            this.findTreeNode(node.children)
+            return this.findTreeNode(node.children);
           }
         }
       }

test-track/frontend/src/business/case/components/import/TestCaseCommonImportNew.vue

@@ -170,6 +170,7 @@ export default {
     },
     handleChange(file, fileList) {
       this.$refs.caseUpload.clearFiles();
+      this.showContinueBtn = false;
     },
     handleExceed(files, fileList) {
       this.$warning(this.$t('test_track.case.import.upload_limit_count'), false);