foundry/Data/systems/dnd5e/templates/advancement/advancement-manager.hbs

<div>
  <div class="step">
    <h1>{{header}}</h1>
    <h2>{{subheader}}</h2>

    <template id="{{flowId}}"></template>
  </div>
  <nav>
    {{#if steps.hasPrevious}}
      <button type="button" data-action="previous">
        <i class="fas fa-angle-double-left"></i> {{localize "DND5E.AdvancementManagerPreviousStep"}}
      </button>
      <button type="button" data-action="restart">
        <i class="fas fa-undo"></i> {{localize "DND5E.AdvancementManagerRestart"}}
      </button>
    {{/if}}
    {{#if steps.hasNext}}
      <button type="button" data-action="next">
          <i class="fas fa-angle-double-right"></i> {{localize "DND5E.AdvancementManagerNextStep"}}
      </button>
    {{else}}
      <button type="button" data-action="complete">
          <i class="fas fa-check"></i> {{localize "DND5E.AdvancementManagerComplete"}}
      </button>
    {{/if}}
  </nav>
</div>