GHPC version 20210505.1 patch notes and development update (Patreon)

This is a minor update, mostly bug fixes and optimizations.

As always, you can access the build via your itch.io library if you've paired an account and previously installed GHPC through the itch app.  You can also access it at the usual link: https://gunnerheatpcdev.itch.io/gunner-heat-pc-patron-build/patreon-access

As an additional note: the lead developer (ActionScripter) is moving this month, and he'll have much less time than usual for development on GHPC.  Since the rest of the team is part-time, this means there probably won't be a big flashy patch at the end of the month like usual.  Nevertheless, we will endeavor to deliver something nice.  Thank you for your understanding and your continued support!