How to add an alpha ordered list option in Redactor? In addition to a bulleted unordered list and a numbered ordered list, I'd like to add an option to format text as an ordered list with upper-alpha letters, like this:

A.

B.

C.

D. 

Can I add this to the list formatting menu somehow? If now, how would I create a custom formatting option that creates an ol?

EDIT 9/4

I am able to add custom formatting (with formattingAdd) to create &lt;ol class="my-class"&gt;&lt;/ol&gt;, but I haven't found a way to allow li elements to be created inside it.
I ended up making a custom redactor plugin for this. Code at https://github.com/FosterCommerce/redactor-alphalist (repo is currently private but should be published soon).