Extend color correction functionality

# Please follow the general troubleshooting steps first:

- [x] I carefully followed the instructions in the [README](https://github.com/alvr-org/ALVR/blob/master/README.md) and completed successfully the setup wizard.
- [x] I read the ALVR Wikis [here](https://github.com/polygraphene/ALVR/wiki) and [here](https://github.com/alvr-org/ALVR/wiki)

If your issue is about games not working, please open an issue for every game and list the game in the title.

### Bug reports:

I noticed that the color in Oculus Quest 1 looks different from what it is supposed to be in Desktop, especially in the darker blue-green color, found in VRChat loading screen or Beat Saber's blue.
I took a few screenshots from the Desktop, compared to from the Quest which confirm the color difference.
Brightness/saturation can be mitigated in color correction settings, but hue is also slightly warmer.
Codec: H264 (nvenc)
Color Correction: Disabled

The picked color value is the solid background minimally affected by compression artifact.

The exact same color shift can also be seen when looking at a previous screenshot through SteamVR Desktop view, suggesting that the issue affect not just the game, but also the entire SteamVR UI.

#### Environement

What hardware do you have: Desktop PC - AMD Ryzen 5 3600, Nvidia RTX 2070, Realtek HD Audio; Oculus Quest 1
What version of ALVR and SteamVR have you tried: 15.1.0
Do you have the latest Windows updates?: Windows 10 20H2