request: Add waiting for auth state to GUI

[russellb]

Right now the gui has a red (Not Connected) and green (Connected) state.

When running nexctl nexd status, there is also a WaitingForAuth state that could be reflected in the GUI. If the GUI is scraping the log instead of using nexctl, it could assume it's in this state when it finds an auth URL without a successful connection coming after it (whatever it does now to present the Copy Auth URL button to be on). In this case, it could have a yellow state that says "Waiting for Auth" or something like that.