.list{max-height:400px;overflow:auto}.helperClass{z-index:999999999}.helperClass>.app-border{border:1px solid #e2e3e7!important;z-index:99999999!important;-webkit-box-sizing:border-box;box-sizing:border-box;border-radius:8px;position:relative;padding:5px;text-align:center}