* update icons
* add background loading of sound sequences
- fix bug with preFunction
- remove most of the old preloading code
* update spritesheets for karate man, marching orders
* file explorer chart loading
* update icon for trick on the class
* add way of creating sound sequences in inspector
- actually implement GameAction preFunction
- implement sound scheduling for Jukebox and MultiSound
* Dj School: fix turntable effect being parented to root
* Pajama Party: fix sleep action type not carrying over between transitions
* Textboxes: setup prefab
* Textboxes: basic functionality finished
* Textbox: scaling
* Textbox: open captions
* Textbox: res edits
* Textbox: song artist
* Textbox: closed captions
* Textbox: fix not being able to use multiple text events
* I/O: save / load remixes using UTF-8 encoding
* Textboxes: stop editor shortcuts while typing