Fixed bug where "Comment posted" snackbar appears again when hitting back to go back to post page
// After 3.5 seconds, add style display:'none' to snackbar
setTimeout(function () {
document.getElementById('snackbar').style.display = 'none'
}, 3500)
setTimeout(function () {
document.getElementById('snackbar').style.display = 'none'
}, 3500)