Error Message at wrong doc type

If you choose a wrong document type or a zip with wrong document types in it - nothing happens.

Better:
Some kind of error message is popping up immediately and tells you that you tried to upload a wrong type.

added Feature label

mentioned in issue #21 (closed)

Sounds good

Not sure if that's the best way, but we could use notifications for this: https://mw-frontend-dev.tugraz.at/apps/demo/de/vpu-notification-demo

I think this is a very good option! Maybe other notification should also look like this.

Fixed in #c462869cc16044fd87880ee38fbb084acb5201bb

closed