client/app/pods/components/topic-modal/template.hbs

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{{#modal-dialog title=topicTitle proceedButton="Change" cancel="closeModal" submit="changeTopic"}}
    <form role="form">
        <div class="form-group">
            <label>Topic</label>
            {{input class="form-control" elementId="topic" value=topic}}
        </div>
    </form>
{{/modal-dialog}}