[BUG]: Cannot delete image content element

[Michael-N-M]

Description After creating an image, you cannot delete it via the studio interface.

To Reproduce Steps to reproduce the behavior:

1. Create and submit an image
2. Open that image and try to delete
3. Image deletion fails
4. See error

Expected behavior You should be able to delete the image

Environment (please complete the following information):

• OS: [Windows]
• Browser [Chrome]
• Botpress Version [e.g. 12.26.6]
• NodeJS [e.g. 12.13]

[laurentlp]

@Michael-N-M is this related to this issue? https://github.com/botpress/studio/issues/140