The form which triggered an event should be passed as the final argument to event handlers

[cwohlman]

It should be possible to get the form instance which triggered an event from within any handler of that event:

'documentSubmit': function (e, tmpl, doc, form) {
  // in some cases form != tmpl.form because this handler is attached to a different template
}

[vladbalan]

Looks like a test is failing