function saveSettings () {
    let data = {
        'systemsMap': systemsMap,
        'typesMap': typesMap,
        'groupByOption': groupByOption,
        'autoupdate': updateEnabled,
        'autoplay': playNextInTg,
        'autogrowViewport': autogrowViewport,
        'autoshiftViewport': autoshiftViewport,
        'autoscroll': autoscrollToPlaying,
    }
    localStorage.setItem('callbrowserSettings', JSON.stringify(data));
}

function loadSettings () {
    let data = localStorage.getItem('callbrowserSettings');
    if (data) {
        data = JSON.parse(data);
        systemsMap = data['systemsMap'];
        typesMap = data['typesMap'];
        groupByOption = data['groupByOption'];
        updateEnabled = data['autoupdate'];
        playNextInTg = data['autoplay'];
        autogrowViewport = data['autogrowViewport'];
        autoshiftViewport = data['autoshiftViewport'];
        autoscrollToPlaying = data['autoscroll'];
    }
}

function clearSettings () {
    localStorage.removeItem('callbrowserSettings');
    location.reload();
}