Changes proposed:

• Fix interaction with gossip launched by accepting quest (using QUEST_FLAGS_LAUNCH_GOSSIP_ACCEPT)
  1. CMSG_QUEST_GIVER_ACCEPT_QUEST
     • https://github.com/TrinityCore/TrinityCore/blob/master/src/server/game/Handlers/QuestHandler.cpp#L188 (prepare and send gossip menu)
     • https://github.com/TrinityCore/TrinityCore/blob/master/src/server/game/Entities/Creature/GossipDef.cpp#L243 (populate interaction data)
  2. CMSG_CLOSE_INTERACTION (client sends this opcode always)
     • https://github.com/TrinityCore/TrinityCore/blob/master/src/server/game/Handlers/MiscHandler.cpp#L1159 (interaction data is reset)
  3. The client shows the gossip but interaction data is empty so any gossip menu option will fail this check: https://github.com/TrinityCore/TrinityCore/blob/master/src/server/game/Handlers/NPCHandler.cpp#L201

Issues addressed:
None

Tests performed:
Builds, tested in-game

Known issues and TODO list: (add/remove lines as needed)
None