[mr3283] Improvements for chat channels
[mr3284] Make possible use mounts in ICC and Ruby Sanctum
[mr3285] Improve DuelHandler
[mr3286] Correct use "override" in AddToWorld() / RemoveFromWorld()
[mr3287] GameEventMgr: added possibility to hide announce of the event start; some improvements
[mr3288] Do not cast spell after game object use, when already handled on SD2 side
[mr3289] Implement and use GameObject::GetInteractionDistance()
[mr3290] Clear unnecessary type cast ObjectGuid -> ObjectGuid