Some more materials polish in this hotfix:

• Pyrite can now be heated into Rust and the Rust can be reduced into Iron
• Heating Aqueous Potassium Hydroxide evaporates the Water out
• Mechanical pixels should now all be mineable into loose versions - improved some mechanical pixel names as well
• Removed Heat Resist level 3 from Upgrades because it’s dependent on materials that will be in a future biome
• BUGFIX: fixes for issue where clicking the feedback button could cause it to become ui focused and it would trigger again when pressing spacebar