bad error handling when backend is not reachable

[rabbah]

[/wsk/actions] auth switch guest
Cannot read property 'cloneNode' of null

[rabbah]

looks like because I don't have a deployment up:

ui.js:155 namespace::init error {"name":"OpenWhiskError","message":"Unknown Error From API: connect ECONNREFUSED 127.0.0.1:10001"} 
OpenWhiskError