jellyfin-web/dashboard-ui/components/medialibraryeditor/medialibraryeditor.template.html

<div class="formDialogHeader">
    <button is="paper-icon-button-light" class="btnCancel autoSize" tabindex="-1"><i class="md-icon">&#xE5C4;</i></button>
    <h3 class="formDialogHeaderTitle">
    </h3>
</div>

<div class="formDialogContent smoothScrollY" style="padding-top:2em;">
    <div class="dialogContentInner dialog-content-centered">
        <div style="display: flex; align-items: center;">
            <h1 style="margin: .5em 0;">${HeadersFolders}</h1>
            <button is="emby-button" type="button" class="raised btnAddFolder submit mini" style="margin-left:1em;" title="${ButtonAdd}">
                <i class="md-icon">add</i>
                <span>${ButtonAdd}</span>
            </button>
        </div>
        <div class="paperList folderList" style="padding:.7em 0;"></div>
        <br />
        <div class="libraryOptions"></div>
    </div>
</div>