App version is silently overwritten

Please provide the following details for error reports from https://apps.nextcloud.com/. Ignore in case of a feature request.

## Details

_Unrelated_

## JavaScript Console Output

_None_

## Steps to reproduce

1. Upload an app in version A (e.g. 1.0.0) or have it in the app store (just for preparation)
2. Update the app (fix bugs) bug forget to update the appinfo.xml file
3. Sign the corrected app (version B, e.g. 1.1.0)
4. Upload the app using the web frontend
5. Get the message that the app version was successfully uploaded

## Additional information

You might check that the app appears on the list of published releases. Nevertheless, the old version A was silently overwritten which might cause even more strange effects.

I would vote to

1. Include the version number in the result message on the web frontend after updating the app
2. optionally: Add a warning if you uploaded a version that was known before in the app store.

I consider this somewhere between a bug report and a feature request. I was bitten by the assumption that I cannot silently overwrite apps on the store. In that sense, it is a bug. But you can interpret it as a feature request for more output at least.