foundry/Data/systems/dnd5e/templates/advancement/item-choice-flow.hbs

<form id="{{appId}}" data-level="{{level}}" data-id="{{advancement.id}}" data-type="{{type}}"
  data-current="{{choices.current}}" data-max="{{choices.max}}">
  <h3>{{{title}}}</h3>

  <div class="drop-target">
    {{#if advancement.configuration.hint}}
      <p>{{advancement.configuration.hint}}</p>
    {{/if}}

    {{#each previousLevels}}
      <h4 class="form-header">{{localize "DND5E.AdvancementLevelHeader" level=@key}}</h4>
      {{#each this}}
        <div class="item-name flexrow">
          <div class="item-image" style="background-image: url('{{this.img}}');"></div>
          <label class="flexrow"><h4><a data-uuid="{{this.uuid}}">{{this.name}}</a></h4></label>
        </div>
      {{/each}}
    {{/each}}

    <h4 class="form-header">
      {{localize "DND5E.AdvancementItemChoiceChosen" current=choices.current max=choices.max}}
    </h4>

    {{#each items}}
      <div class="item-name flexrow">
        <div class="item-image" style="background-image: url({{this.img}});"></div>
        <label class="flexrow">
          <h4>
            <a data-uuid="{{this.uuid}}">{{this.name}}</a>
          </h4>
          {{#if this.dropped}}
            <a class="item-control item-delete" title="{{localize 'DND5E.ItemDelete'}}">
              <i class="fas fa-trash"></i>
            </a>
            <input type="hidden" name="{{this.uuid}}" value="true" data-dtype="Boolean">
          {{else}}
            <input type="checkbox" name="{{this.uuid}}" {{checked this.checked}} {{disabled this.disabled}}>
          {{/if}}
        </label>
      </div>
    {{/each}}

    {{#if advancement.configuration.allowDrops}}
      <p class="hint centered">{{localize "DND5E.AdvancementFlowDropAreaHint"}}</p>
    {{/if}}
  </div>
</form>