Final changes before 3.3 possibly?

[JCog]

Various smaller things:

• added ability to save both Mario/Peach state and Watt/Sushie/Laki ability state to file using unused global bytes (only loads properly when loading from the fp file menu or importing a file, not the vanilla file select - might be worth fixing in the future, but didn't seem worth the effort to figure out the hook when that's almost never how it'll be used)
• massively simplified the code for transparent black backgrounds and added them to the trainers where it made sense
• changed green/red flag icons to green/gray for accessibility
• added about menu with fp version, manual, Github contributors, and special thanks
• fixed global byte for Quizmo star piece count in file menu
• set new default command bindings (break free was the only one changed, others were previously unbound - chosen kind of arbitrarily, but just seemed like a good idea to have them set to something)
• renamed attack cheat to power since that seems more intuitive with Power Plus