jellyfin-web/src/controllers/dashboard/library.html

<div id="mediaLibraryPage" data-role="page" class="page type-interior mediaLibraryPage librarySectionPage fullWidthContent" data-title="${HeaderLibraries}">
    <div>
        <div class="content-primary">
            <div class="padded-top padded-bottom">
                <button is="emby-button" type="button" class="raised btnRefresh">
                    <span>${ButtonScanAllLibraries}</span>
                </button>
                <progress max="100" min="0" style="display: inline-block; vertical-align: middle;" class="refreshProgress"></progress>
                <a is="emby-linkbutton" rel="noopener noreferrer" class="raised button-alt" target="_blank" href="https://jellyfin.org/docs/general/server/libraries">${Help}</a>
            </div>

            <div id="divVirtualFolders"></div>
        </div>
    </div>
</div>