support hiding UI elements that only apply to 3.0 compat mode

Change-Id: I52829c695680baae448dc8f74aff8d9d4888af65
Reviewed-on: http://review.couchbase.org/33706
Reviewed-by: Aliaksey Artamonau <aliaksiej.artamonau@gmail.com>
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>