A simple refresh icon that can be added to the navbar at the #refresh id in the DOM. Call needsRefresh() to add the icon.

refresh.js

// Add refresh app icon
function needsRefresh() {
    $('#refresh').empty();
    html = `
    <button class="btn" data-toggle="tooltip" title="Click to refresh app"><i data-feather="refresh-cw" onclick="refresh();"></i></button>
    `
    $('#refresh').append(html);
    $('[data-toggle="tooltip"]').tooltip()
    feather.replace()
}

// Refresh the app
function refresh() {
    $('#refresh').empty();
    location.reload();
}