Have better feedback for call failures (SIP/Jami)
When making a call to someone who cannot be reached, the following occurs:
- the call screen shows briefly, then disappears
- no visible feedback as to the reason for failure is available afterwards The Windows client has a patch-set in progress to provide a notification with a human readable string and status code: https://review.jami.net/c/ring-client-windows/+/12058