Xenon 3.1.3+1.19.4

Xenon has been archived. Xenon will not receive any further updates unless the author decides to unarchive the project.

Fixed two critical bugs:
1. CommandProcessor blocks all messages when disabled
2. FeatureList and CommandProcessor are disabled on world exit, but are not re-enabled
Added option for CommandProcessor and FeatureList to re-enable on joining world, even if they were disabled
Downgraded Wurst Client and WI-Zoom (un)compatibility level from "breaks" to "conflicts"
Added Mod Menu integration for config screen

I'm going on holiday until June 6, so I won't be able to test and fix the mod until I get back, sorry!