public void RemoveTileset(TilesetList.Tileset tileset)
        {
            editor.tilesetList.RemoveTileset(tileset);

            if (editor.tilesetList.Count > 0)
            {
                tilesetIndex = Math.Max(0, tilesetIndex - 1);
            }
            else
            {
                Active = false;
            }
        }
        public void Draw(TilesetList.Tileset tileset, int indexoffset)
        {
            mesh.Texture = tileset.Texture;

            mesh.Color        = Color.White;
            mesh.UsingTexture = true;

            mesh.Reset();
            mesh.Translate(Position);
            mesh.Scale(Size);

            mesh.Draw();

            marker.Draw();
        }