NPCs turn towards player even if invisible/sneaking
Even if the player is invisible and sneaking, NPCs will turn towards them, when in close range. Creates difficulties with pickpocketing/other criminal behaviour.
(RM-1685 from redmine: created on 2014-07-24 by Nicola Bodill, , closed on 2014-07-30 by Michał Ściubidło, relates #1503 (closed), relates #1734 (closed))