GPU priority hack

This is a pre-release, it might cause unexpected issues.

This release does not change anything to the configurations, so you can safely downgrade to the stable release if you find it problematic.

Please report any findings you have with this version to the corresponding discussion:

1. Does it solve or decrease the frequency of HAGS freezing?
2. Does it affect game performance?
3. Does it improve stuttering issues?
4. Have you noticed any other things get affected?

Please report with your system configurations including CPU/GPU model, memory type and speed, operating system and version, and GPU driver version.