Give me a way to find all the queries using a custom attribute

Situation: You have a custom attribute that excludes a bunch of tags from reporting, pretty normal. You need to add a new tag in, also pretty normal.

When you add the tag to the custom attribute and save, immediately every single query using that attribute breaks and stops using it at all. You have to then find every single query using it, reselect "true" (or false, or what have you, whatever you use), and then, open every Dashboard that those queries are on, edit the Dashboard, find the tab the query is in use on (because this also is not specified anywhere), wait for the specific query to finish loading, and finally, re-save the tab. This is truly a huge mountain of work for a relatively small task. 

For this request, all I'm asking is that we have some sort of way to figure out all the queries that use a custom attribute or metric, because there's no way I can go through 800+ queries manually every time any custom attribute needs a little adjustment.