movim_ynh/sources/app/widgets/Notifs/notifs.css

#notifs_widget li:not(:first-child) {
    display: list-item;
}

#notifs_widget li img {
    max-height: 2em;
    float: left;
    margin-right: 0.5em;
    border-radius: 1em;
}

#notifs_widget.groupshown li:not(:first-child){
    display: none;
}

#notifs_widget.groupshown ul li:first-child:before {
    font-family: "Material Design Iconic Font";
    content: "\f2c2";
    display: inline-block;
}

#notifs_widget ul li:first-child:before {
    font-family: "Material Design Iconic Font";
    content: "\f2c0";
    display: inline-block;
}