Core/Maps: Fixed incorrect difficulty markers shown on the interface inside Icecrown Citadel (always displaying normal mode)

src/server/game/Entities/Player/Player.cpp

@@ -22798,7 +22798,7 @@ void Player::SendInitialPacketsBeforeAddToMap()
     // SMSG_INSTANCE_DIFFICULTY
     data.Initialize(SMSG_INSTANCE_DIFFICULTY, 4+4);
     data << uint32(GetMap()->GetDifficulty());
-    data << uint32(0);
+    data << uint32(GetMap()->IsRaid() && GetMap()->IsHeroic()); // Raid dynamic difficulty
     GetSession()->SendPacket(&data);
 
     SendInitialSpells();

src/server/game/Groups/Group.cpp

@@ -1554,7 +1554,7 @@ void Group::SendUpdateToPlayer(uint64 playerGUID, MemberSlot* slot)
         data << uint8(m_lootThreshold);                 // loot threshold
         data << uint8(m_dungeonDifficulty);             // Dungeon Difficulty
         data << uint8(m_raidDifficulty);                // Raid Difficulty
-        data << uint8(0);                               // 3.3
+        data << uint8(m_raidDifficulty >= RAID_DIFFICULTY_10MAN_HEROIC);    // 3.3 Dynamic Raid Difficulty - 0 normal/1 heroic
     }
 
     player->GetSession()->SendPacket(&data);