Bringing Back Forward Render Mode

Due to the feedback surrounding the performance loss with some of the graphics upgrades (forgot to mention HDR is now force-enabled in deferred mode for decals, requires more VRAM) I'm currently working on again allowing you to use forward mode, although it's a bit trickier now with these improvements but it should be doable. I definitely do recommend using deferred and it will be my main focus for some of the upcoming graphics improvements, but forward will be there for the lower spec computers. Bear with me! :)