Cockpit Client has no file handling for "Desktop viewer" in cockpit-machines

[jelly]

Explain what happens

1. Start a VM in cockpit-machines
2. Select the "Desktop viewer"
3. Click "launch remote viewer"

Notice that nothing happens, nothing is downloaded or launched as cockpit client has no file handling implemented.

Version of Cockpit

273

Where is the problem in Cockpit?

Unknown or not applicable

Server operating system

Arch Linux

Server operating system version

No response

What browsers are you using?

Cockpit Client / Cockpit Desktop

System log

No response