Variety of desktop-related improvements

[TLATER]

Variety of desktop-related improvements

This should be a series of PRs, but I'm too lazy to make 8 PRs for this:

• Set timezone to Netherlands
• Enable low-latency for pipewire
• Switch to the linux_xanmod kernel
• Enable cursor timeout
• Enable display timeout
• Add mangohud
• Fix a comment about gamescope