Remove Uberimage reference

If you've an Uberimage field set to reference mode so that you can reference another node with an Uberimage field in it. A "remove reference" button/link would be a good thing.

Case: User creates a new article and wants to reference the node "Image 3":

1. User writes "ima" in the reference field and clicks the "Image 3" which drops down
2. The user realizes that this image is quite bad and wants to upload a new one instead
3. As the "Create new image" link disapeared once another node was referenced (as it should), the user is looking for a way to remove this reference just made.

At the moment, this can be solved by removing the text in the Uberimage field and then clicking outside it (not pressing enter since that submits the form, #642332: Avoid submit/error mesage on enter key in reference field), however it's not that intuitive.