Rabbit Hole form appears on a node delete form

Won't allow the settings form to appear on delete form

Hi,
the patch solves the issue but I think we should take into account other delete forms such as:
* Canceling a user account
* Deleting entity bundles (such as content types and vocabularies

I have extended the provided patch in order to fix this other forms as well.

I reviewed and tested this and it seems okay, so I committed it.

This might recur for more exotic use cases - e.g. if someone provides a rabbit hole plugin for a custom entity, if a custom module adds extra node operations that shouldn't have rabbit hole settings. If so, I might revisit this later and try a more complex solution - probably provide a whitelist of operations in an entity plugin method with some reasonable defaults if it's not overridden.