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

<div>
    <h1 style="display:inline-block;vertical-align:middle;">${HeadersFolders}</h1>
    <button is="emby-button" type="button" class="raised btnAddFolder submit mini" style="margin-left:1em;" title="${ButtonAdd}">
        <iron-icon icon="add"></iron-icon>
        <span>${ButtonAdd}</span>
    </button>
</div>
<div class="paperList folderList" style="padding:.7em 0;"></div>