Try using a drawn grid instead of a shader grid

[inc0der]

It was cool at the time, easy to implement but it's currently not really good compared to the minor issues it introduces.

One problem with the shader grid is when scaling the container the grid is contaiend within, the grid produces some darker lines. This could be fixed, but not sure if it's worth it.

We can still use the Grid component, but instead of using the shader we simply draw the lines manually.