Comment 2 for bug 1689325

So far, I've run into (and fixed) a bug 1722899 (which was exacerbated by the changes to the modals here.)

Perhaps a better approach (if we feel necessary) in order to thoroughly test this would be to generate a shared spreadsheet of all the affected modals and spread the testing among a couple of volunteers.

Might be overkill to test this way, however, yet it might help identify perhaps which modals would benefit from being able to be dismissed by clicking outside of it (in the backdrop).