[MapEditor] Ensured consistent usage of the common tile information class
[Client] Removed old and useless code
[Client] Fixed illegal comparable implementation
[MapEditor] Fixed incomplete equal implementations
[Common] Fixed incomplete equals implementation
[Engine-Slick] Fixed comparator for display modes
[Engine] Fixed graphics resolution implementation
[easyNPC] Resolved potential stream writing problem
[Client] Added missing break
[Nifty-Controls] Show and hide merchant overlays properly