MB-10341: mode control transferred to css

we should be able to control mode priority

Change-Id: Ie315c9217d43b5eec409d73ebf5bf8e65ff4ecfc
Reviewed-on: http://review.couchbase.org/34259
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>