packages/omni-ui/omni-web/src/components/WorkbenchButtons.hbs

<div
  class="block top-5 right-5 absolute z-10 mt-2 w-12"
>

<div

    class="cursor-pointer hover:text-white p-2 rounded-full bg-white bg-opacity-50 absolute -top-4"
    @click="workbench.hideExtension()"
    x-show="workbench.activeExtension?.extensionConfig.addBackButton === true"
    x-tooltip="Return to Editor Canvas"
  >
    <svg
      class="w-4 h-4 fill-transparent"
      viewBox="0 0 24 24"
      fill="none"
      stroke="currentColor"
      stroke-width="2"
      stroke-linecap="round"
      stroke-linejoin="round"
      class="feather feather-arrow-left"
    >
      <line x1="19" y1="12" x2="5" y2="12" />
      <polyline points="12 19 5 12 12 5" />
    </svg>

  </div>
</div>

</div>