Quick List keyboard shortcuts in all popups

Hi! I found a feature that I would like to have and thought that I would make a plugin that solves it. I have looked at the documentation but I'm not sure if what I'm trying to do is possible with plugins.

In Quick lists the entries are given the numbers 0-9 as shortcuts as shown to the left of each row. My goal with my plugin was to add these 0-9 shortcuts to the elements in all popups as well as use A-Z as keyboard shortcuts. Below is an example Quick List and a mockup of what I want my plugin to do. Is this possible to do with plugins? I'm thinking it should be done with Extensions somehow but not sure where to start..