No indication of attachment upload failures

[mjog]

Expected behaviour

If an attachment from local disk fails to upload (network problem, file too large, etc), an indication that a problem has occurred and what the cause of the problem is displayed.

Actual behaviour

If an attachment fails to upload, nothing happens.

I just got off the phone supporting someone using Mail for the first time, they were trying to upload a 42M file but it wasn't working and didn't know what was happening. Turns out the file was too large for the servers limit, but they had no idea what was going on because there was no feedback, the upload UI just vanished.

Mail app

Mail app version: 1.4.0

Mailserver or service: Dovecot

Server configuration

Operating system: Debian 10

Web server: Apache

Database: MariaDB

PHP version: Whatever comes with Debian 10

Nextcloud Version: 19.0.0

Client configuration

Browser: GNOME Web 3.36.2

Operating system: Ubuntu 20.04

[ChristophWurst]

Ideally we show an error inline but the first step would be to use like one of the toasts that we have. @GretaD would you like to have a look?