Fix map grid text labels not rendering properly depending on zoom & map size - this changes map grids to be slightly different sizes depending on map size (146.3 target, 152m on 3500, 150m on 4500) - however the grid is now is correctly centered on the map - number of grids = Floor(MapSize * 7 / 1024) - size per grid = MapSize / number of grids This also fixes teleport2grid not working on certain map sizes (like 3500) - this was due to the map rendering 24 grids (breaking at different zoom levels too) instead of 23 grids (3500 map size = 23.92 grids)