How to toggle input monitoring state of a track

This should do it:

/**@param {string} partialTrackName */
function getFirstTrackContaining(partialTrackName) {
    return sf.ui.proTools.visibleTrackHeaders.filter(th => th.normalizedTrackName.includes(partialTrackName))[0];
}

/**@param {AxPtTrackHeader} track */
function trackToggleInput(track) {
    var inputBtn = track.buttons.whoseTitle.is('TrackInput Monitor').first;
    inputBtn.elementClick({}, `Couldn't find track input button`);
}

function main() {
    let track = getFirstTrackContaining('[Mix');
    if (!track) throw `Couldn't find a Mix track\nPlease make sure the track is visible`;

    trackToggleInput(track);
}

main();

The group script would need to select the track, like this (but could also be made to restore the track selection afterwards):

function getGroupListItem(groupName) {
    var groupList = sf.ui.proTools.mainWindow.tables.whoseTitle.contains('Group').first;
    if (!groupList.exists) throw `Couldn't find Group List`;
    return groupList.childrenByRole("AXRow").allItems.map(function (r) {
        return {
            row: r,
            selectBtn: r.childrenByRole("AXCell").first.children.first,
            name: r.childrenByRole("AXCell").allItems[1].children.first.title.value.match(/^.+ - ([^(]+)/)[1].replace(/ $/, ''),
        };
    }).filter(function (r) { return r.name == groupName })[0];
}

function selectTracksInGroup(groupName) {
    var groupListItem = getGroupListItem(groupName);
    if (!groupListItem) throw `Couldn't find group "${groupName}"`;
    groupListItem.selectBtn.elementClick({}, `Couldn't select tracks in group "${groupName}"`);
}

/**@param {AxPtTrackHeader} track */
function trackToggleInput(track) {
    var inputBtn = track.buttons.whoseTitle.is('TrackInput Monitor').first;
    inputBtn.elementClick({}, `Couldn't find track input button`);
}

function main() {
    selectTracksInGroup('PrintMaster');

    trackToggleInput(sf.ui.proTools.selectedTrack);
}

main();