If you're looking to have it specifically for the webui, the original didn't have that functionality so this one doesn't either. If you noticed that it broke in the regular gtk window, where the bottom labels weren't updating/were empty, I have updated my post with a new version (2.0.1).

I made a version of this plugin that works on Deluge 2 (Python 3.8). You can find it here https://github.com/PhasecoreX/deluge-ratio, or I have built the egg and attached it here.

Enjoy!