shopxo/public/static/admin/default/css/cache.css

.content-right .am-panel {
    position: relative;
}
.content-right .am-panel .cache-submit {
    width: 70px;
    height: 33px;
    position: absolute;
    top: -1px;
    right: -1px;
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
}