When uploading a file of type damUploadField it is not possible to delete it afterwards.

Steps to reproduce

1. Create a new component definition, you can test it using the dialog attached image.yaml.
2. Go to the pages app and create a component.
3. Choose "upload", upload an image and save
4. Open up the dialog again and delete the image 
5. Open again the dialog: the image has not been removed, you can still see it in the dialog and in JCR.

Expected results

The image should be removed.

Dev notes

• Let's check if this is a problem also with uploadField
• damUploadField used by customer in support - do we need to anything about that? - in MGNLDAM-880 there's a breaking change for this
• It seems work on "normal" upload field (in contact, asset app). But in here, damUploadField in component in page app.