Patch 1.2.11

• Added a sanity check to the class transformer to avoid crashes in certain cases (if parent classes of classes implementing SimpleComponent mark certain methods as final, specifically). This fixes a crash when OC is used together with the latest version of DragonAPI, for example.
• Improved fill rate computations of screens and using it to determine whether to render at all, improving frame rate for empty screens (e.g. powered-down computer but non-powered-down screen).
• Fixed another minor issue in the class transformer.
• Fixed error in filesystem module in case the ROM was unmounted but nothing else mounted to /.
• Fixed a glitch that could cause players to get stuck on cables.