fix(UI自动化): 关联UI用例提示问题

--bug=1021701 --user=张大海 【测试跟踪】测试计划-关联UI用例-未选择用例和选择用例未选择环境提示信息不符 https://www.tapd.cn/55049933/s/1324194

test-track/frontend/src/business/plan/view/comonents/ui/RelevanceUiScenarioList.vue

@@ -281,6 +281,9 @@ export default {
         });
       });
     },
+    closeEnv(){
+      this.$refs.envPopover.close();
+    }
   }
 };
 </script>

test-track/frontend/src/business/plan/view/comonents/ui/TestCaseUiScenarioRelevance.vue

@@ -150,10 +150,6 @@ export default {
       let map = this.$refs.apiScenarioList.map;
       let envGroupId = this.$refs.apiScenarioList.envGroupId;
 
-      if (!envMap || envMap.size == 0) {
-        this.$warning(this.$t('api_test.environment.select_environment'));
-        return;
-      }
       selectRows.forEach(row => {
         selectIds.push(row.id);
       })
@@ -162,6 +158,11 @@ export default {
         return;
       }
 
+      if (!envMap || envMap.size == 0) {
+        this.$warning(this.$t('api_test.environment.select_environment'));
+        return;
+      }
+
       let param = {};
       param.planId = this.planId;
       param.mapping = strMapToObj(map);