Comment settings are now a field, but not an editable one: breaks in-place editing

As of #731724: Convert comment settings into a field to make them work with CMI and non-node entities, comment settings are a field. When rendered, you get to see the actual comments plus possibly the comment form. However, to Edit module, this is just another field; it has no way of knowing that this in fact not a field with actual editable content. So it marks the stuff CommentDefaultFormatter outputs as in-place, by setting a data-edit-field-id attribute on it.

Consequently, there is a bizarre blue bar (which is actually the "comment field" being marked as in-place editable) at the bottom of the page when in-place editing, that clearly makes in-place editing look broken:

The solution is to set edit.editor = "disabled" in CommentDefaultFormatter's annotation: that tells Edit that this field formatter does not support in-place editing at all. Result: