wayvr/dash-frontend/assets/gui/tab/t_tab_title.xml

<layout>
  <!-- translation, icon -->
  <template name="TabTitle">
    <div gap="8" align_items="center">
      <sprite src_builtin="${icon}" width="24" height="24" />
      <label translation="${translation}" size="18" weight="bold" />
    </div>
  </template>
</layout>