To add bullets, add this to .sidebar li
around line 1889 –
list-style-type: disc;
margin-left: 20px;
It should look like this in the end –
.sidebar li {
border-bottom: 1px dotted #ddd;
list-style-type: disc;
margin-bottom: 10px;
margin-left: 20px;
padding-bottom: 10px;
}