discourse/app/assets/javascripts/admin/addon/components/themes-list.hbs

<div class="themes-list-header">
  <DButton
    @action={{fn this.changeView this.THEMES}}
    @label="admin.customize.theme.title"
    class={{concat-class "themes-tab" "tab" (if this.themesTabActive "active")}}
  />
  <DButton
    @action={{fn this.changeView this.COMPONENTS}}
    @label="admin.customize.theme.components"
    @icon="puzzle-piece"
    class={{concat-class
      "components-tab"
      "tab"
      (if this.componentsTabActive "active")
    }}
  />
</div>

<div class="themes-list-container">
  {{#if this.showFilter}}
    <div class="themes-list-filter themes-list-item">
      <Input
        class="filter-input"
        placeholder={{i18n "admin.customize.theme.filter_placeholder"}}
        autocomplete="off"
        @type="search"
        @value={{mut this.filterTerm}}
      />
      {{d-icon "search"}}
    </div>
  {{/if}}
  {{#if this.hasThemes}}
    {{#if this.hasActiveThemes}}
      {{#each this.activeThemes as |theme|}}
        <ThemesListItem
          @theme={{theme}}
          @navigateToTheme={{action "navigateToTheme" theme}}
        />
      {{/each}}

      {{#if this.hasInactiveThemes}}
        <div class="themes-list-item inactive-indicator">
          <span class="empty">
            {{#if this.themesTabActive}}
              {{i18n "admin.customize.theme.inactive_themes"}}
            {{else}}
              {{i18n "admin.customize.theme.inactive_components"}}
            {{/if}}
          </span>
        </div>
      {{/if}}
    {{/if}}

    {{#if this.hasInactiveThemes}}
      {{#each this.inactiveThemes as |theme|}}
        <ThemesListItem
          @classNames="inactive-theme"
          @theme={{theme}}
          @navigateToTheme={{action "navigateToTheme" theme}}
        />
      {{/each}}
    {{/if}}
  {{else}}
    <div class="themes-list-item">
      <span class="empty">{{i18n "admin.customize.theme.empty"}}</span>
    </div>
  {{/if}}
</div>

<div class="create-actions">
  <DButton
    @action={{this.installModal}}
    @icon="upload"
    @label="admin.customize.install"
    class="btn-primary"
  />
</div>