AngularJS: display spinner by default

Change-Id: Iba2072cd1202c52f2b298d5a3a1178a1f917fc6c
Reviewed-on: http://review.couchbase.org/40869
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>