Core/Quests: Fixed QuestScript::OnQuestStatusChange incorrectly triggering with QUEST_STATUS_INCOMPLETE when removing items from quest objectives on rewarding quest

Port From (https://github.com/TrinityCore/TrinityCore/commit/2c9b67f00be95bd816dbaa9db43838a67e187753)

Source/Game/Handlers/QuestHandler.cs

@@ -381,6 +381,8 @@ namespace Game
                     Quest quest = Global.ObjectMgr.GetQuestTemplate(questId);
                     QuestStatus oldStatus = _player.GetQuestStatus(questId);
 
+                    _player.RemoveActiveQuest(questId);
+
                     if (quest != null)
                     {
                         if (quest.HasFlagEx(QuestFlagsEx.NoAbandonOnceBegun))
@@ -401,10 +403,8 @@ namespace Game
                     }
 
                     GetPlayer().SendForceSpawnTrackingUpdate(questId);
-                    GetPlayer().SetQuestSlot(packet.Entry, 0);
                     GetPlayer().TakeQuestSourceItem(questId, true); // remove quest src item from player
                     GetPlayer().AbandonQuest(questId); // remove all quest items player received before abandoning quest. Note, this does not remove normal drop items that happen to be quest requirements. 
-                    GetPlayer().RemoveActiveQuest(questId);
                     GetPlayer().DespawnPersonalSummonsForQuest(questId);
 
                     Log.outInfo(LogFilter.Network, "Player {0} abandoned quest {1}", GetPlayer().GetGUID().ToString(), questId);