little hack for an old nextcloud

nextcloud-menu.css

#appmenu:hover li svg, #appmenu:hover li .icon-more, #appmenu:hover li .icon-more-white, #appmenu:hover li .icon-loading-small, #appmenu:hover li .icon-loading-small-dark {
    transform: translateY(7px);
}
#appmenu:hover li span {
    opacity: 0.6;
    top: 2px;
    z-index: -1;
}

#appmenu li {
    position: relative;
    cursor: pointer;
    padding: 0 10px;
    display: flex;
    justify-content: center;
}

 select#category_selector{
    background-image: none !important;
}