.o-discuss-ChannelActionDialog .modal-header {
    --modal-header-border-width: 1px;
    --modal-header-padding: calc(var(--modal-padding) * 0.4) calc(var(--modal-padding) * 0.7);

    .btn-close {
        position: static !important;
        padding: 0px;
        margin: 0px !important;
    }
}