CarstenKochElsdorf

Bitte CarstenKochElsdorf in pull-request-erstellen.md einfuegen.

my user name `CarstenKochElsdorf` should be added to pull-request-erstellen.md.

[Bug]: signal-desktop does not show images.

11

### What happened? When a message contains an image, the image is not shown. Instead, signal-desktop shows a color rectangle with a black circle in the middle that contains an...