Hey i just wanted to say i downloaded a copy of your (this) tileeditor on github, and started modifying it because i missed the ability of fullscreen mode on window and be able to scroll vertically if current tilesheet had more tiles on it than viewport available. And also some more functions of not having to manually move tilesheets and map in folder but let browse function in app handle that. Hope thats ok and is it any specific way you would like credit for this?
I can give you the repo once its more stable.