Failing file upload should result in an error message shown to the user

[ilyabo]

No error message is shown on the client when a server-side request for file upload (sent upon choosing a file in the file browser) fails. The error is just ignored silently:

This is important, for instance, to tell the user that the uploaded file does not satisfy size or format restrictions.

Using 0.9.0-dev

[sameer-kumar-jain]

Any plan or update on this?

[Kmaschta]

Until we code a solution for the Image and Upload fields, here is a workaround: #541 (comment)