quay/static/css/directives/ui/dockerfile-build-dialog.css

.dockerfile-build-dialog-element .btn-group {
    margin-bottom: 20px;
}

.dockerfile-build-dialog-element button i {
  margin-right: 6px;
}

.dockerfile-build-dialog-element .trigger-list {
  margin: 0px;
  width: 100%;
}