discourse/app/assets/javascripts/discourse/app/templates/components/emoji-uploader.hbs

<div class="emoji-uploader form-horizontal">
  <div class="control-group">
    <span class="label">
      {{i18n "admin.emoji.name"}}
    </span>
    <div class="input">
      <Input @id="emoji-name" @name="name" @placeholderKey="admin.emoji.name" @value={{readonly this.name}} @input={{action (mut this.name) value="target.value"}} />
    </div>
  </div>
  <div class="control-group">
    <span class="label">
      {{i18n "admin.emoji.group"}}
    </span>
    <div class="input">
      <ComboBox @name="group" @id="emoji-group-selector" @value={{this.group}} @content={{this.newEmojiGroups}} @onChange={{action "createEmojiGroup"}} @valueProperty={{null}} @nameProperty={{null}} @options={{hash
          allowAny=true
        }} />
    </div>
  </div>
  <div class="control-group">
    <div class="input">
      <input
        class="hidden-upload-field"
        disabled={{this.uploading}}
        type="file"
        multiple="true"
        accept=".png,.gif">
      <DButton @class="btn-primary" @translatedLabel={{this.buttonLabel}} @icon="plus" @action={{action "chooseFiles"}} @disabled={{this.uploading}} />
    </div>
  </div>
</div>