Sonarr/UI/Settings/Indexers/CollectionTemplate.html

<div class="row">
    <div class="span12">
        <button class="btn btn-success x-add">Add</button>
    </div>
</div>

<div class="row">
    <div class="span12">
        <div id="x-indexers" class="form-horizontal"></div>
    </div>
</div>