Bugfixes and new stuff — PropFight Steam update #345411

It is now possible to make levels with a different camera zoom. This permits to have bigger levels. Backgrounds, Killscreens and Powerups are not scaled, Events aren't either, but it's not forced. A few levels were added to showcase this new feature. - Add some more levels - Remove CRT option, bring it back in an event with a better look (Pixelize) - Add a bit of audio processing for some events (Pixelize, Wind, Tsunami, LowGravity) - Change a lot of powerup visuals to fix physics interpolation, accidentally making some of them better (Revert, HighJump, Sleep, Freeze) - Put back Godot Input for emotes on triggers (for controllers) - Fix some many minor bugs - Lots of tweaks here and there Also, the API was updated