Fix Frustum view of the 2D camera

[Gallasko]

The 2D camera can only see between a z of 0 and 1
The current workaround is to divide the z value by 100 in shader to get a range of 0 to 100 and have proper draw order
aWorldPos.z / 100.0f

THIS IS NOT THE CORRECT WAY TO DO IT !
Need to set up correctly the frustum in the renderer so it can be changed in runtime !