Unity HUD-like module

[TheLastProject]

Unity had a really cool feature called HUD that allowed you to search through the application menus of the active application. It would be really cool if Pext could have a module for this too, but I haven't found any way to do this in Python.

Documentation: https://wiki.ubuntu.com/Unity/HUD
There also seems to be a KRunner extension for it: https://afiestas.org/appmenu-runner-meet-the-kde-hud/ (SSL seems broken, but the page works)
GNOME Shell plugin: https://github.com/p-e-w/plotinus
MATE app (seems most promising): https://github.com/ubuntu-mate/mate-hud

If anyone has an idea on how to do this, or even implement it themselves, that would be amazing. Please state any useful info in this issue.

Screenshots:
Unity