discourse/app/assets/javascripts/admin/addon/templates/modal/admin-reseed.hbs

<DModalBody
  @title="admin.reseed.modal.title"
  @subtitle="admin.reseed.modal.subtitle"
  @class="reseed-modal"
>
  <ConditionalLoadingSpinner @condition={{this.loading}}>
    {{#if this.categories}}
      <fieldset>
        <legend class="options-group-title">{{i18n
            "admin.reseed.modal.categories"
          }}</legend>

        {{#each this.categories as |category|}}
          <label>
            <Input
              class="option"
              @type="checkbox"
              @checked={{category.selected}}
            />
            <span>{{category.name}}</span>
          </label>
        {{/each}}
      </fieldset>
    {{/if}}

    <br />

    {{#if this.topics}}
      <fieldset>
        <legend class="options-group-title">{{i18n
            "admin.reseed.modal.topics"
          }}</legend>

        {{#each this.topics as |topic|}}
          <label>
            <Input
              class="option"
              @type="checkbox"
              @checked={{topic.selected}}
            />
            <span>{{topic.name}}</span>
          </label>
        {{/each}}
      </fieldset>
    {{/if}}
  </ConditionalLoadingSpinner>
</DModalBody>

<div class="modal-footer">
  <ConditionalLoadingSpinner @condition={{this.reseeding}} @size="small" />
  <DButton
    @action={{action "reseed"}}
    @class="btn-danger"
    @label="admin.reseed.modal.replace"
    @disabled={{this.reseeding}}
  />

  {{#unless this.reseeding}}
    <DModalCancel @close={{route-action "closeModal"}} />
  {{/unless}}
</div>