The following stealth changes are implemented.

- Combat no longer removes stealth, only damage does
 - Creatures will pursue a stealthed unit they cannot see if they're already in combat with them
 - When a player is ~~3 yards~~ 8% + 1.5 yards away from the usual stealth detection distance, the creature will perform the "alerted" effect.
 - When sitting/sleeping creatures are distracted or alerted, they will stand up
 - Idle movement creatures will return to their original (spawn) orientation after distract/alert
 - When entering combat with a distracted/alerted creature, distract state is removed
 - NPC no longer have a limit to stealth visibility (granted by stealth modifier spells/buffs)
 - If alert visibility is greater than aggro range, no alert sent

src/server/game/AI/SmartScripts/SmartAI.cpp

@@ -469,7 +469,13 @@ void SmartAI::MoveInLineOfSight(Unit* who)
         {
             if (!me->GetVictim())
             {
-                who->RemoveAurasByType(SPELL_AURA_MOD_STEALTH);
+                // Clear distracted state on combat
+                if (me->HasUnitState(UNIT_STATE_DISTRACTED))
+                {
+                   me->ClearUnitState(UNIT_STATE_DISTRACTED);
+                   me->GetMotionMaster()->Clear();
+                }
+
                 AttackStart(who);
             }
             else/* if (me->GetMap()->IsDungeon())*/