discourse/app/assets/javascripts/admin/templates/customize-themes-edit.hbs

<div class="current-style {{if maximized 'maximized'}}">
  <div class='wrapper'>
    <h2>{{i18n 'admin.customize.theme.edit_css_html'}} {{#link-to 'adminCustomizeThemes.show' model.id replace=true}}{{model.name}}{{/link-to}}</h2>

    <ul class='nav nav-pills target'>
      <li>
        {{#link-to 'adminCustomizeThemes.edit' model.id 'common' fieldName replace=true title=field.title}}
          {{i18n 'admin.customize.theme.common'}}
        {{/link-to}}
      </li>
      <li>
        {{#link-to 'adminCustomizeThemes.edit' model.id 'desktop' fieldName replace=true title=field.title}}
          {{i18n 'admin.customize.theme.desktop'}}
          {{fa-icon 'desktop'}}
        {{/link-to}}
      </li>
      <li>
        {{#link-to 'adminCustomizeThemes.edit' model.id 'mobile' fieldName replace=true title=field.title}}
          {{i18n 'admin.customize.theme.mobile'}}
          {{fa-icon 'mobile'}}
        {{/link-to}}
      </li>
    </ul>

    <div class='admin-controls'>
      <ul class='nav nav-pills fields'>
        {{#each fields as |field|}}
          <li>
            {{#link-to 'adminCustomizeThemes.edit' model.id currentTargetName field.name replace=true title=field.title}}
              {{#if field.icon}}{{fa-icon field.icon}} {{/if}}
              {{i18n field.key}}
            {{/link-to}}
          </li>
        {{/each}}
        <li class='toggle-maximize'>
          <a {{action "toggleMaximize"}}>
            <i class="fa fa-{{maximizeIcon}}"></i>
          </a>
        </li>
      </ul>
    </div>

    <div>
      <div class='custom-ace-gutter'></div>
      {{ace-editor content=activeSection editorId=editorId mode=activeSectionMode autofocus="true"}}
    </div>

    <div class='admin-footer'>
      <div class='status-actions'>
        {{#unless model.changed}}
          <a class='preview-link' href={{previewUrl}} target='_blank' title="{{i18n 'admin.customize.explain_preview'}}">{{i18n 'admin.customize.preview'}}</a>
        {{/unless}}
      </div>

      <div class='buttons'>
        {{#d-button action="save" disabled=saveDisabled class='btn-primary'}}
          {{saveButtonText}}
        {{/d-button}}
      </div>
    </div>
  </div>
</div>