R1:47856dc93f7e

Track how many columns use a particular trigger

Summary:
Ref T5474. In 99% of cases, a separate "archived/active" status for triggers probably doesn't make much sense: there's not much reason to ever disable/archive a trigger explcitly, and the archival rule is really just "is this trigger used by anything?".

(The one reason I can think of to disable a trigger manually is because you want to put something in a column and skip trigger rules, but you can already do this from the task detail page anyway…