Core/Player: Keep shared quests through map changes instead of getting stuck in busy state

Port From (https://github.com/TrinityCore/TrinityCore/commit/c12ee97f122acfd77bd81cf178a77d5054c312b6)

Source/Game/Entities/Player/Player.Fields.cs

@@ -252,7 +252,8 @@ namespace Game.Entities
         uint m_PlayedTimeLevel;
 
         Dictionary<byte, ActionButton> m_actionButtons = new Dictionary<byte, ActionButton>();
-        ObjectGuid m_divider;
+        ObjectGuid m_playerSharingQuest;
+        uint m_sharedQuestId;
         uint m_ingametime;
 
         PlayerCommandStates _activeCheats;

Source/Game/Entities/Player/Player.Quest.cs

@@ -33,9 +33,11 @@ namespace Game.Entities
 {
     public partial class Player
     {
-        public ObjectGuid GetDivider() { return m_divider; }
-        public void SetDivider(ObjectGuid guid) { m_divider = guid; }
-
+        public uint GetSharedQuestID() { return m_sharedQuestId; }
+        public ObjectGuid GetPlayerSharingQuest() { return m_playerSharingQuest; }
+        public void SetQuestSharingInfo(ObjectGuid guid, uint id) { m_playerSharingQuest = guid; m_sharedQuestId = id; }
+        public void ClearQuestSharingInfo() { m_playerSharingQuest = ObjectGuid.Empty; m_sharedQuestId = 0; }
+        
         uint GetInGameTime() { return m_ingametime; }
         public void SetInGameTime(uint time) { m_ingametime = time; }
 

Source/Game/Entities/Player/Player.cs

@@ -5806,6 +5806,15 @@ namespace Game.Entities
                 _garrison.SendRemoteInfo();
 
             UpdateItemLevelAreaBasedScaling();
+
+            if (!GetPlayerSharingQuest().IsEmpty())
+            {
+                Quest quest = Global.ObjectMgr.GetQuestTemplate(GetSharedQuestID());
+                if (quest != null)
+                    PlayerTalkClass.SendQuestGiverQuestDetails(quest, GetGUID(), true, false);
+                else
+                    ClearQuestSharingInfo();
+            }
         }
 
         public void RemoveSocial()