app/server-control/controllers/kvm-window-controller.html

<div class="kvm-window">
  <div class="kvm__actions">
    <button class="btn  btn-tertiary" ng-click="close()">
      <icon file="icon-return.svg" aria-hidden="true"></icon>Return to OpenBmc
    </button>
  </div>
  <kvm-console new-window-btn="false"></kvm-console>
</div>