MB-12092: Display spatial view results

In 3.0 the spatial views return the `key` instead of the `bbox` as they
are now multidimensional and may contain more than two dimensions.

Change-Id: Ia93997cb962d835385de4c930126657ffecd8239
Reviewed-on: http://review.couchbase.org/41024
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>