- in fact we will now jump to the login screen for any error other than socket timeout because of an OS wake-up
- this patch also contains a re-work of the REST API exception. Coder backend sends very detailed messages
  with the reason for the http calls to be rejected. We now un-marshall those responses and fill the exception
  system with better details.

- forcing the main screen to always show the same exception
- this patch refactors the code to accumulate the errors in a buffer and show them when auth screen is visible
- in addition, the error reporting uses the Snackbar api which provides greater control, and the possibility
  to stack errors one on top of each other. This approach simplifies the code on our side even more because
  the ui page no longer needs to accumulate the errors in a buffer and process them when a notifier is
  injected by toolbox.