jellyfin-web/dashboard-ui/collections.html

<div id="boxsetsPage" data-role="page" class="page libraryPage backdropPage collectionEditorPage noSecondaryNavPage" data-backdroptype="movie,boxset" data-require="scripts/moviecollections,paper-fab">

    <div data-role="content">
        <div class="viewSettings">

            <div class="listTopPaging">
                &nbsp;
            </div>
        </div>
        <div class="itemsContainer paddedItemsContainer" style="text-align:center;"></div>
        <div class="noItemsMessage" style="display: none; text-align: center;">
            <p>${MessageNoCollectionsAvailable}</p>
        </div>

        <paper-fab class="btnNewCollection bottomFab" icon="add" style="position:fixed;right:20px;background-color:#db4437;"></paper-fab>
    </div>
</div>