Comment 2 for bug 2002257

I am willing to add the ability to open multiple testers, but only using the template tester action. If a tester is open in some special context like a rule or editing a composite template then only one instance will be permitted. Doing otherwise is a huge can of worms.

@kovid: are you OK with non-modal parentless windows? In this case the user can switch back to the standard gui with alt-tab and windows can cover each other.