MB-9408: able to set outline color and title of window

Change-Id: I9f80a2bd6034783173702b6072d69b829bb0ff10
[alk@tut.by: adjusted hooks.js]
[alk@tut.by: disallow visual settings POST for ro admin]
Signed-off-by: Aliaksey Kandratsenka <alk@tut.by>
Reviewed-on: http://review.couchbase.org/30694
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>