Bullet point lists are called “unordered lists” and their html tag is <ul>. While numbered lists are called “ordered lists” and their html tag is <ol>.
Long story short: wherever you see ul ul in the aforementioned hack/custom-css, add a comma followed by ol ol to apply the same css rules to the ordered lists. Same goes for ul ul::before, adding ol ol:before.
This is my current code:
/* BULLET POINT RELATIONSHIP LINES */
.cm-hmd-list-indent .cm-tab, ul ul, ol ol {
position: relative;
}
.cm-hmd-list-indent .cm-tab::before, ul ul::before, ol ol::before {
content: '';
border-left: 1px solid #EEE;
position: absolute;
}
.cm-hmd-list-indent .cm-tab::before {
left: 0;
top: -5px;
bottom: -4px;
}
ul ul::before, ol ol::before {
left: -11px;
top: 0;
bottom: 0;
}