Simplify grid tiles update code
Simplify grid tiles update code

Now that we temporary save the textures, there is no need to update the grid from bottom to top when going up
joolswills/EmulationStation,joolswills/EmulationStation,jrassa/EmulationStation,jrassa/EmulationStation,jrassa/EmulationStation,joolswills/EmulationStation,jrassa/EmulationStation,joolswills/EmulationStation