Simultaneously turn off all checkboxes in Gerrit 'Aggregated test results'?

[eernstg]

On a page like https://dart-ci.firebaseapp.com/cl/384480/1, if would be great if we had a top-level check box that covers all elements in the list, or some other way to turn off all the checkboxes using a single click!

It does get a little tedious to find and click off something like 12 different top level checkboxes in order to turn them all off, and then find a couple of items that should actually be approved, based on a specific issue.