Core/Threat: Fix by faq.

Turning gm on, now drops threat.
Dead mobs no longer holds threat on player.
Also fixed some Engrish.

src/server/game/Entities/Unit/Unit.cpp

@@ -12823,9 +12823,8 @@ void Unit::setDeathState(DeathState s)
 {
     // death state needs to be updated before RemoveAllAurasOnDeath() calls HandleChannelDeathItem(..) so that
     // it can be used to check creation of death items (such as soul shards).
-    m_deathState = s;
 
-    if (s != ALIVE && s != JUST_ALIVED)
+    if (s != ALIVE && s != JUST_RESPAWNED)
     {
         CombatStop();
         DeleteThreatList();
@@ -12868,8 +12867,12 @@ void Unit::setDeathState(DeathState s)
         if (ZoneScript* zoneScript = GetZoneScript() ? GetZoneScript() : (ZoneScript*)GetInstanceScript())
             zoneScript->OnUnitDeath(this);
     }
-    else if (s == JUST_ALIVED)
+    else if (s == JUST_RESPAWNED)
+    {
         RemoveFlag (UNIT_FIELD_FLAGS, UNIT_FLAG_SKINNABLE); // clear skinnable for creature and player (at battleground)
+    }
+
+    m_deathState = s;
 }
 
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