The best I could do is switch to tabs from spaces as indents, set tab size to 8, and tweak reading view with a little CSS to align. Not customizable, but wide enough indents that more or less align in both views.
ul {
padding-left: 2em;
}
That said I’d still like this issue properly addressed. This and other edge cases (like the broken two spaces) make all the indent options superfluous, as none of them work predictably other than tabs.