Prowlarr/src/UI/History/Details/HistoryDetailsLayoutTemplate.html

<div class="modal-dialog">
    <div class="modal-content">
        <div class="history-detail-modal">
            <div class="modal-header">
                <button type="button" class="close" data-dismiss="modal" aria-hidden="true">&times;</button>

                <h3>
                    {{#if_eq eventType compare="grabbed"}}Grabbed{{/if_eq}}
                    {{#if_eq eventType compare="downloadFailed"}}Download Failed{{/if_eq}}
                    {{#if_eq eventType compare="downloadFolderImported"}}Episode Imported{{/if_eq}}
                </h3>

            </div>
            <div class="modal-body">

            </div>
            <div class="modal-footer">
                {{#if_eq eventType compare="grabbed"}}<button class="btn btn-danger x-mark-as-failed">mark as failed</button>{{/if_eq}}
                <button class="btn" data-dismiss="modal">close</button>
            </div>
        </div>
    </div>
</div>