And a lot of my add-ons modify similar templates so sometimes thinking in terms of the template being modified sometimes returns a pretty huge list even when using the filter.
I would like to suggest something simple.
It would be great if the entire list was collapsed by default and you could expand them by clicking on the add-on title. A cookie being set could keep track of which categories were or weren't collapsed. Couple that will a couple of extra links that expand or collapse all, and I think overall this will be much more user friendly.
As most add-ons now will utilise TMs I think generally this usability enhancement would make everyone's life easier -- even if you're just browsing the list.