refactor render pipeline

[stohrendorf]

CE-386

Unfortunately, this became a little bit larger than originally planned.

• crt filter is now be properly applied as a final full screen effect
• fxaa shader replaced with one that actually works
• fxaa quality preset selection from display settings
• increased bloom visibility

[stohrendorf]

Unfortunately it seems I need to tweak some FXAA settings, as it adds a massive amount of blur, which in addition to other blurring effects (like depth of field or bloom) results in a totally blurred and ugly image.

[serishema]

I had another look. In colleseum with depth of feild and fxaa on I notice lara looks out of focus, which doesn't happen in caves. It seems to depend on the lighting.
In future i'll try graphics options together and in isolation.

[stohrendorf]

Did some invasive changes to this pull request. FXAA finally seems to work now, blurring doesn't seem to occur anymore that much except for the wanted blur.