I never used AddonCategory.
So there is a settings menu where you select the addons and move them to categories via a dropdown box?
Maybe one can replace those dropdowns by LibScrollableMenu somehow. This library can be put "on top" of some normal dropdown boxes so that you can use a scrollable box and add a header where you even got a search editbox (cenetr screen, the context menu popup shows it):
I never actually tried that. So no promises or deadline
It would need an addon change to Addon Category's settings menu. But as I find the time I can have a look.
Edit:
After having a look at Addon Category's settings menu it provides some dropdowns to change the "order" of the categories.
So one could change thsoe dropdowns to use these LAM widget instead:
https://www.esoui.com/downloads/info...Boxwidget.html
I had created that widget to provide an easy drag&drop (and also using buttons to first, to previous, to next, to last) orderlist for LAM settings menus and it's basically what you ask for (except a search functionality which could be added to that widget).
It also provides a button to add a new entry or remove entries which would make the extra current buttons to add or remove categories obsolete too.
-> "All in 1" widget then: Add, remove, order
Only adding addons to the categories would be something that needs an additional UI would be something to add there, which could be assisted by LibScrollableMenu then.
So I'll have a look if changing AddonCategory settings to this widget helps.